Isn't stocks just pure speculation as well? If we all knew that something would take off in value; we'd all be rich.
I've made thousand off this stuff & the technology behind it is actually pretty good. It's obviously way to early on in terms of large scale use but doesn't mean it's going to crash & burn now. Saying that it's gonna die is pure speculation as well. Nobody knows till it happens. Having a 15% drop in price is nothing unheard of when it comes to Crypto.
It's unheard of because Crypto currencies are so new, but it has all the same faults and signs as well as benefits that stocks and other market trends do.
Albeit it's not as easy to track, but even looking at this graph it's clear that bitcoin is going to take a large hit before it ends up coming back up, if ever like it was before.