Assuming you are talking about PoS systems, I think they are very promising but it's still not obvious that they can achieve the same risk profile as PoW system

Assuming you are talking about PoS systems, I think they are very promising but it's still not obvious that they can achieve the same risk profile as PoW systems. I think they are worthy of further research and I am excited to see how Eth 2.0 works in practice, but I don't think we understand the economic nature of cryptocurrencies well enough to definitively say that it can completely replace Bitcoin.