If bitcoin fails, then the whole entire crypto economy will collapse. Almost every crypto is the same as bitcoin. If bitcoin prices go down, then maybe all crypto is soon going to follow and it might impact the World economy and also banks around the world.
I never thought bitcoin would fail, if bitcoin fails it's possible that the crypto industry will be gone. Bitcoin is more and more widely accepted and used. The war between Russia and Ukraine is showing the importance of bitcoin in the future, but if bitcoin dies now, I think it will not affect the world economy and especially the banks. we all know banks are barely interested in bitcoin because it hurts their position.