People wouldn't be able to exchange USD for BTC, so bad.
Ill trade you a quarter bitcoin for that nice boat of yours.
See how easy that was? No dollar or banker needed.
HA FOOL!
That quarter Bitcoin is now worth two boats!
Oh Shit, no wait a minute, now it is only worth half a boat! Hey, give me my fkn boat back!
Wait!? What is this?, Now the exchange won't give me my money until I prove where my Bitcoin came from!
Fuck them, I will just cash it out on LocalBitcoins......"How much premium was that you are charging!? Did you just say 20% under spot!?"
Holy shit!
Next time, just wire the funds into my account buddy, ok?