Now I have accumulated a small amount to be able to reopen a bank account but I think that instead of opening a new bank account, it is be better to just buy and invest in bitcoin so that I can expect more profit than the traditional bank.
Who knows if this may be the best decision you ever made but in my opinion it is.
You still need bank accounts though just for a different purpose because you might need it someday. Then, save some cash instead of putting it all in one basket in BTC or in bank.
Diversify. I think wise people scatter all their assets at some point to have an option where they would pull their money whenever they are outside or inside the house. Just be careful with the volatility especially if you are in the trading business.