A tulip could have bought a house in 1637. A tulip bulb is a useless commodity in 2017, but not in 1637...
At some point in time, in my opinion, Bitcoin will be refereed to as useless, too. That's not to say its not a worthy contender to speculate on now, quite the opposite actually.
Right now it's in the 'hype' stage - and if the support of $2877 fails to hold....well, it's time to say good night.
It will be an interesting one to watch - Bitcoin isn't my area of knowledge anyway - so i'm trigger happy