Some government have no choice but to adopt the cryptocurrency in their economy so that they can take benefits from it through setting taxes from any crypto-related transactions.
But still they chose to not accept crypto above all, that's why banks experience crisis and crypto is not that affected. If governments are including crypto in their banks, people will surely try to invest and engage in this improved system in their economy. We all know that China is really good in terms of businesses related activities so probably they will not let their banks to become bankrupt, they have a huge economy.
Well, banks do end up bankrupting but that is mainly due to them not really doing their due diligence when giving loans and that means people are not paying what they should (well what did you expect if you loan to people who couldn't pay you back) and also one of the reasons is the fact that they are not regulated too hard.
If a government says that banks will be regulated like crazy, that would eventually result with banks not making that much profit, since they are not profiting their shareholders will not profit, since they do not have that much money they won't be loaning out or investing to other stuff, since they don't do that everyone will have hard time starting a new business or find investment, all of this cripples the economy. So, as you can see banks took all nation under their blackmailing if they fail.