Being a digital currency bitcoin is secure, easy to trasfer anytime and anywhere, any amount of money can be transacted without any hassle of being stolen.
Bank notes on the other hand has logistics issues if the amount is huge, can be lost, have to keep it safe from fire, water, or any element that can destroy the bank note, hard to detect fake bank notes.
To avoid cheating & its matter of trust & it should be transparent  such kind of transaction more useful in Organizations.