Well, I think investing in bitcoin is easier and simpler compare to bank, as we know we have to deal with many forms and procedures in banks, and that is the main poin that will make people leave them and stay with bitcoin.
Crypto currency was innovated to eradicate banking system. Though banking system is so convenient for fiats, crypto founder felt the need for easy transaction without third party. Hence Peer to Peer transaction was introduced and everything was possible to do from where you are with high security. Blockchain technology supports crypto currencies for every move. Blockchain can not be hacked.