I do not see much of a difference, but I do not trust banks anyway therefore I prefer to keep all my money myself
Keeping your money by yourself has a greater chance being stolen than inside a bank, even if you put it inside a safe/vault with experienced robbers it won't be any problem with them
In case of cash/fiat money, then you're right, it's a better choice to keep it at banks as everything you store at home in physical form is too risky.
why not trust banks? They don't still hour money anyway they just decrease its value over time.
The main reason for people to not trust banks is that they use people's money to gamble with it on the financial markets. If everything works out as they planned, it's all good for banksters themselves, but the customers and tax payers don't benefit from it. But when things don't go to plan, and banksters end up making huge losses, the bill will be passed to the customers and the tax payers. Not fair, right?
Bitcoin (digital wallet file) is something that you can either have stored in a USB drive, or burned on a CD/DVD. Paper wallets are something that you can precisely hide somehwere in your house as it is nothing more than a thin sheet of paper. In this regard the far better option is to have your money stored in Bitcoin within your house. No one will notice anything.