its imposible if we live without banks, banks are very helpful for the community's economy. starting from saving, deposit to borrowing. everyone would need a loan of money, and only banks are the solution. so it's unlikely that we live without a bank.
Nothing is impossible. We can perfectly do without the benefits of modern civilization and there are still many places on our planet where the population continues to live a primitive social and economic life, another question is whether it is advisable. Many centuries of human experience have led us to the current working model of the economy and we need to be very careful about experiments in this area, because it is easy to break, but it is difficult to build.
Yes, it is necessary to take into account that if we use paper money, then we use the services of a bank, since paper money is issued by the central bank of the state. And people are unlikely to give up cash in the foreseeable future. And there is no need to do this. People will enjoy the convenience and benefits of different means of payment, and many of them will be oblivious to whether they are centralized or decentralized.
Some may try not to use the services of banks and not use their paper money. However, why deliberately go for such restrictions? It seems to me that this should not be done.