It is not that simple how you think. Banks have money, and they are doing audits every 6 months, yes, some banks can go the way you described, but this is a way to bankruptcy. If you are ever interested in investments, you will know that all money and economics are going through a spiral. So you just need to catch the upper maximum and sell your stocks/crypto/real estate with profit and repeat. I don't say that banks cannot control the game, but with so many players, the game is becoming really interesting, especially today in times of COVID and war in Ukraine. We will see how far it will go, and I even invested in some stocks at the suggestion of my broker, Equity Release Bristol.