Sure its amazing to have full control of your money without need to ask banks to let you witdraw your funds ,they take a fee from your money that they lend to others,then ask for some days to be able to withdraw big ammounts like 10k dollars ,bitcoin can moove milion into anywhere.
But if you save bitcoin until million dollars in bitcoin wallet, it is not safely. Hackers and cracker can detect your own wallet and maybe will steal your money. So better have more then one wallet to save a lot amount of bitcoin.