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That's what I have been saying to the friends of mine that are overhyping bitcoin, knowing that there is a limitation, I just accept the fact that there are some things that are unachievable to bitcoin, like what OP says about the collapse of central banks, it will be difficult for bitcoin to suddenly fill the void of a central bank collapse, it is not just possible, it is like pulling out a Red Wood tree and replacing it with a sapling hoping to create the same shade.
Let me guess, the friends in this context does not care what you are saying? Because I have seen people hyping up things and can't do rational logic even with the evidence presented to them, can't really blame them, I believe in individuality and I think that anyone is entitled to their opinion even if they are hyping up things as long as they do not hurt themselves or anyone.