Money that is centralized will always end up becoming a bubble since sooner or later those who control the money will end up becoming greedy and issue way too much money leading to asset inflation (like inflated stock and real estate prices) and in turn a collaps. That's why btc is the savior.
Banks simply called as inflation but the reality is there printing more money than what they are supposed to do, if the inflation rate increases a lot then the economy of the country will collapse like Venezuela if people become more smarter then they will adopt to the decentralized payment which can save their value of money going into the hands of few people.