Is ETH Still the Backbone of Web3?

Ethereum, often hailed as the cornerstone of the Web3 revolution, has undergone a significant transformation. Once primarily seen as the 'smart contract chain' where decentralised applications directly resided, its role has evolved considerably. In 2026, Ethereum is better understood as a sophisticated settlement layer, a crucial liquidity hub, a robust developer base, a foundational staking network, an emerging ETF asset, and the bedrock for an expanding web of Layer 2 (L2) ecosystems. This shift makes the question of Ethereum's continued relevance far more nuanced than a simple 'is it still important?' For Australian investors, understanding this evolution is key to navigating the opportunities and complexities within the digital asset landscape.

The core query for those eyeing their portfolios is whether the underlying Ether (ETH) token effectively captures sufficient value from the extensive activity now built around its infrastructure. Crypto investors, DeFi participants, developers, and Web3 enterprises worldwide, including those in Australia, find Ethereum difficult to overlook. It continues to anchor much of the decentralised finance (DeFi) economy, facilitate major stablecoin and tokenised asset movements, and serve as the essential base layer for numerous scaling solutions known as rollups. However, a significant development is that users now interact with the broader Ethereum ecosystem predominantly through these Layer 2 networks rather than the Ethereum Mainnet itself. This analysis delves into Ethereum's current position, assessing its strengths, inherent risks, and how L2 scaling reframes the investment thesis for Australian crypto enthusiasts.

What happened

Ethereum's operational blueprint has fundamentally shifted from its earlier, simpler iteration. In past crypto cycles, decentralised applications (dApps) almost exclusively launched and operated directly on the Ethereum Mainnet. Activities such as DeFi protocols, NFTs, Decentralised Autonomous Organisations (DAOs), token launches, stablecoin transfers, and on-chain trading all converged on this single execution layer. This is no longer the complete picture; Ethereum has matured into a multi-layered ecosystem.

The Mainnet retains its critical role as the high-security base layer, providing the foundational trust and settlement. However, a substantial portion of user activity has migrated to Layer 2 networks. Ethereum's own scaling roadmap explicitly champions rollups as a primary method for expanding network capacity. These L2s process transactions independently while leveraging Ethereum for essential functions like settlement, verification, and data availability. This architectural evolution means Ethereum's 'backbone' function is less visible to the everyday user. An Australian beginner in the crypto space might transact on a network like Base, bridge assets to Arbitrum, utilise an Optimism-based application, or mint NFTs via a wallet abstraction tool without directly interacting with or even realising the underlying role of the Ethereum Mainnet. Yet, Ethereum almost invariably underpins the security, finality, or liquidity of these actions.

For investors, this presents a more complex analytical challenge. While activity across the broader Ethereum ecosystem may surge, it won't always manifest as high gas fees or direct transaction volume on the Mainnet. The pertinent question in 2026 is no longer solely about Mainnet usage, but rather whether Ethereum remains the trusted base layer for Web3 capital, developer innovation, and critical application infrastructure. Key developments like the Pectra upgrade in 2025 further enhanced account functionality, validator operations, and blob throughput for L2s, underscoring Ethereum's commitment to scaling and user experience.

Why it matters for Australian investors

For Australian investors, the evolution of Ethereum presents both opportunities and considerations. The move towards a layered architecture inherently changes the investment thesis for ETH. No longer is it solely about Mainnet transaction fees driving value; instead, the value proposition is tied to Ethereum's role as the secure, decentralised settlement layer for a vast ecosystem. This means understanding the health and growth of the various L2s built atop Ethereum is just as crucial as observing Mainnet metrics.

When evaluating ETH, Australian investors should expand their focus beyond just price action. Tracking on-chain metrics like total value locked (TVL) across the entire Ethereum ecosystem (Mainnet + L2s), the growth of developer activity, the volume of staked ETH, and the demand for data 'blobs' (introduced with upgrades like Dencun) that L2s utilise, offers a more comprehensive picture. Australian exchanges like CoinSpot, Independent Reserve, Swyftx, and BTC Markets all offer ETH, making it easily accessible. However, understanding the underlying technological shifts is paramount for informed decisions.

Furthermore, the Australian Taxation Office (ATO) treats cryptocurrencies like ETH as property for tax purposes. Gains from trading or staking ETH are subject to Capital Gains Tax (CGT), while income from staking rewards is generally considered ordinary income. The increasing complexity of the Ethereum ecosystem, with various L2s and DeFi protocols, means investors must be diligent in tracking their transactions for tax reporting. The underlying principle, however, remains that Ethereum, in its expanded form, continues to underpin a significant portion of the global crypto market, making its health relevant to the broader Australian digital asset investment landscape.

Impact on the AUD market

While Ethereum is a global network, its developments have direct implications for the Australian dollar (AUD) crypto market. As ETH is a primary trading pair on Australian exchanges, its price movements significantly influence the overall market sentiment and liquidity available for other altcoins. A robust, scaling Ethereum ecosystem can attract more capital into the broader crypto space, some of which invariably flows through AUD-denominated gateways. This includes an increase in trading volumes for ETH/AUD pairs and heightened interest in related DeFi projects and tokens accessible to Australian users.

Australian financial regulators, such as ASIC and AUSTRAC, monitor the crypto space closely. The continued maturation and scaling of Ethereum, leading to a more stable and predictable environment (despite inherent volatility), could influence regulatory perspectives. A more efficient and widely adopted Ethereum ecosystem may encourage clearer guidelines and foster confidence among institutional investors operating in Australia. Conversely, any security vulnerabilities or major disruptions within the Ethereum ecosystem, especially concerning L2s or bridges, could lead to market instability, impacting AUD-denominated crypto holdings and potentially influencing regulatory caution.

The prospect of Ethereum-based ETFs, particularly if they gain traction globally, could also indirectly impact the AUD market. While Australia currently has limited spot crypto ETF offerings, global trends often provide a roadmap. Increased institutional access to ETH via ETFs could boost its credibility and demand, potentially reflecting in the AUD crypto market. This enhanced accessibility offers Australian investors diversified pathways to gain exposure to Ethereum, moving beyond direct token purchases to potentially regulated investment vehicles.

What to watch next

For Australian investors looking ahead, several key areas warrant close attention regarding Ethereum's trajectory. Firstly, closely monitor the ongoing development and adoption of Layer 2 solutions. The success of L2s directly contributes to Ethereum's scalability and broad user appeal. Watch for advancements in various rollup technologies, their security models, and the ease of bridging assets between Mainnet and L2s, and between different L2s themselves. Any significant security breaches or operational issues within major L2 projects could impact investor confidence across the board.

Secondly, observe the metrics related to ETH's value capture. This includes staking participation rates, as more ETH locked in staking potentially reduces circulating supply. Also, keep an eye on Mainnet transaction fees (even if lower due to L2s, they still represent core demand for Ethereum's security) and, importantly, the demand for blob space, which is critical for L2 data availability. ETF flows, particularly if spot Ethereum ETFs gain approval in major markets, will be a significant indicator of institutional interest and could drive substantial capital into the ecosystem.

Thirdly, remain aware of the competitive landscape. While Ethereum holds a dominant position, alternative Layer 1 blockchains and emerging modular networks continue to innovate, offering different trade-offs in terms of cost, speed, and user experience. Australian investors should assess how Ethereum's ecosystem adapts and maintains its competitive edge. Finally, regulatory developments, both locally from ASIC and AUSTRAC, and internationally, will always play a pivotal role. Clarity in regulation regarding DeFi, L2s, and staking could significantly de-risk the investment environment and foster greater mainstream adoption in Australia.