As we all know it's hard to talk about bitcoin without examining how it shakes the world of banks and traditional finance. for years now banks have been the place where we go to keep our money safe and they also hand all our transactions. But bitcoin have come to show us another way that is safe, cheap, fast and more open compared our traditional banking system.
There are tons of reasons why Banks didn't like bitcoin at first. One of them is the fact that bitcoin's growth literally kinda created money from thin air and to valuate it , banks have to actually cover for it by creating cash to compensate the liquidity it has already generated in terms of volume. Secondly the bank can't really control bitcoin besides, it's a decentralized network and there is no central body to get hold of to initiate a reasonable level of control. Bitcoin was simply Satoshi's way of expressing a flawless cash system.