A layer 2 is a second blockchain that runs on top of a main one to make it faster and cheaper, while still relying on the main chain for security. Ethereum is secure and widely trusted, but when it is busy, fees rise and transactions slow down. A layer 2 processes transactions on its own, in bulk, then posts a compressed record back to Ethereum - so you get fees of a few cents and near-instant transfers, with Ethereum still acting as the final record. Base, built by Coinbase, is a common one, which is why many tokenized real-world assets run on it.

Why does Ethereum need a layer 2 at all?

Ethereum is the most established network for real-world assets, but it has a built-in limit: every transaction is processed by thousands of computers worldwide, which is what makes it secure but also what makes it slow and, at peak times, expensive. When the network is congested, a single transfer can cost several dollars or more in gas fees.

That is fine for a large one-off trade, but it breaks small, frequent actions - like receiving a modest monthly distribution from a tokenized property. Paying a few dollars in fees to receive a few dollars in rent makes no sense. The network needed a way to scale without giving up Ethereum's security.

What is a layer 2, exactly?

A layer 2 is a separate blockchain that handles transactions off the main chain, then settles back to it. Think of the main chain (the "layer 1") as a court of final record, and the layer 2 as a fast local office that batches up a day's work and files one summary with the court. You get the speed and low cost of the local office, backed by the authority of the court.

Crucially, the layer 2 inherits Ethereum's security. It does not ask you to trust a new company with final say over your funds - it periodically posts its data to Ethereum, so the main chain remains the ultimate source of truth. This is the key difference between a layer 2 and simply using a different, separate blockchain.

Why do RWAs use Base?

Base is a layer 2 built by Coinbase on the OP Stack - the same open-source technology behind Optimism, a well-established layer 2. For tokenized real-world assets, Base hits a practical sweet spot:

• Low fees. Transactions typically cost a few cents, which makes small distributions, redemptions, and transfers economical.
• Ethereum security. It settles back to Ethereum, so it does not introduce a separate trust assumption for your assets.
• A serious backer and easy on-ramp. Because Coinbase builds Base, moving USDC and funds between a Coinbase account and Base is straightforward, which lowers the barrier for newcomers.

For an issuer, those low fees mean you can pay out distributions to thousands of holders without the fees eating the returns. For an investor, it means the costs of holding and moving a tokenized asset stay small.

Is a layer 2 safe to use?

Using a layer 2 feels identical to using Ethereum - the same wallet, the same kind of address, the same smart contract model. You simply select the network in your wallet. The leading layer 2s like Base are widely used and hold billions of dollars in value as of 2026.

There are real trade-offs to understand. Layer 2s are newer than Ethereum itself, and some rely on a short waiting period to move funds back to the main chain. These are engineering details the platform handles, not daily concerns for a user - but it is worth knowing that "cheaper and faster" comes from a specific design, not magic.

Where to go next

• Next pillar: custody and ownership of RWAs.
• Back up: how to read a block explorer.
• Glossary: layer 2.

Sources: ethereum.org; Base docs (base.org), as of 2026.