I want to attribute the Layer2 Solution onto Bitcoin as it's progress Itself because this means BTC is the ETHKiller and everything else that wants to take the first place in the long run. (Even privacy solutions? Yes, why not!?)
For that, I share the Ecosystem of the Layer2 Scaling Solutions Overview for Bitcoin from coin98.
We have known legacy names such as Lightning and Rootstock. Tthers that came a little latter as Liquid Network, a spin-off from lightning, Syscoin and Stacks!
I recommend for everyone to check out not only the Main Net, but everything that might come in this bullrun!
Sincerely, I think this Cycle will be BTC L2s, RWAs with a pinch of DeFi, (primarily Dexes) and later Privacy Solutions. Show Less