Why do peoples use Bitcoin?
Bitcoin will change what in currencies world?
Why people use USD? because it's a currency. money needs to be transferred between people for different purposes, bitcoin is a reliable and cheap way of sending money across the globe.
And you didn't need to submit documents to the central bank for your records unlike using bitcoin.
Everyone wants freedom and bitcoin is their way of escaping all the controls being enforced by governments. If i am to send hundred thousand to someone i'd be using bitcoin so it won't be deducted with thousands as well if i do bank to bank.