Let's figure out why blockchains are built like multi-story buildings. It turns out that the architecture of L0, L1, L2, and L3 is not just theory but a practical approach to solving the main crypto problem: how to scale without losing security.

In fact, L0 is the foundation of the entire system. Imagine it as the main infrastructure that allows different blockchains to communicate with each other and exchange assets. Without a solid L0, all the other levels will simply collapse. It's like a railway where trains of different companies run.

It turns out that each level adds something new. L0 provides interaction, L1 consists of the main blockchains, L2 offers scaling solutions, and L3 includes specialized applications. Interestingly, many people don't even think about this hierarchy when trading tokens.

Here are some projects that demonstrate how this works in practice. Polkadot with its DOT (currently trading around $1.21) is a classic example of L0. It has a relay chain that coordinates the work of parachains. Any developer can create their own blockchain, and all of them will interact through Polkadot.

Avalanche with AVAX (current price $9.05) is also interesting, but it works a bit differently. It's more like L1 with its own consensus, but it allows creating decentralized financial applications. I noticed that in the last 24 hours, the price dropped by 0.78 percent, but that's normal volatility.

Cosmos with ATOM (trading around $1.88) shows another approach — a scalable ecosystem where anyone can create a fully independent blockchain for their application, but all of them connect easily via the IBC protocol. That's a pretty elegant solution if you ask me.

The problem that this multi-layered architecture solves is simple: how not to sacrifice security for speed? The L0 level guarantees that data is intact and secure, while the other levels are optimized for specific tasks. This allows the blockchain to develop without breaking its foundations.

If you're seriously interested in blockchain architecture, you should look at how these projects implement the L0 concept. On Gate, you can track the movement of these assets and understand how the market evaluates different scaling approaches.