Everyone knows the base layer. UTXOs, blocks, the usual ceremony. But the interesting stuff is happening on top.
Lightning let agents and bots transact without touching on-chain fees. RGB protocols enable confidential, Bitcoin-backed assets you can program. Ordinals brought NFTs. And now people are experimenting with state channels for gaming and social networks where Bitcoin settles disputes.
The base layer remains deliberately slow and minimal by design. That constraint is the whole point. It forces innovation upward. Every Layer 2 solution has to prove its value proposition independently while still being able to anchor to Bitcoin's security when it matters.
What I find more interesting than any single protocol is the pattern. Builders aren't trying to replace Bitcoin. They're trying to extend it. Each new Layer 2 opens a door that the base layer literally can't walk through.
What's the most surprising Layer 2 use case you've seen lately?