I honestly don't think it'll happen, certainly not in 15 years... In 100 years maybe?
That has a point. Well being a part opposing this type of issue ,I am not against bitcoin's future uses, but given the fact that dollar is a Fiat taht most of the transactions in the world were done using this a s medium of payment, and this is the currwncy of the united states, they may be against in bitcoin if this happened.