IMHO (because to claim to "know" anything about how this is all going to turn out is to be a fraud), Bitcoin is the proof of concept for this whole crypto thing.
It was the first. It was the genesis idea. But good lord, do we think it's the actual solution? What would be the odds?
I imagine that Bitcoin will play its part as the public face of the blockchain revolution, but something else - or many other somethings - will be the successors that we actually use in the future. (Pick your own alt-coin as the successor; good luck.)
If I had a large holding in Bitcoin now I would be cashing out or I'd be nervous. I'm not saying it won't go higher, I'm saying that at some point its demise is inevitable. Might be quick, might be slow, but it'll happen because Bitcoin is not the technically best solution in this incredibly exciting field. It's not even close.