It is said that bitcoin will destroy the fiat system but i believe that if this happens the world will change completly because banks and a lot of things will go out of market.
I think bitcoin can't destroy fiat system maybe in the future it become most popular because of the highest rating of its user's. We know that the fiat system is just exist in ancient civilization, ancient people used money either to bought or trade.
And I think this is the start of spreading and becoming popular of virtual currency to use and out new generation.