I trust bitcoin over banks is simply because the profitability in bitcoin is very high and a lot of investors already gained lots of profit in investing in bitcoin. While in bank our money will just sleep there and will not earn as much as we earn in investing bitcoin and other crypto currencies.
I also trust bitcoin because from bitcoin, I can make a profit. although the profit is not bigger, I am happy to earn bitcoin. so far, besides earning more bitcoin, I can also earn from another coin so if I exchange my bitcoin, I can take big money. I don't have good experience with the banks because, in every month, I think I need to pay the monthly fee and if I compare the fee and the profit from the banks, it still bigger the fee so I think my money is reduced slowly.