Yep, as usual once it goes parabolic it means a crash will happen sooner or later, it's a good time to take some profit but if you are a long term holder uninterested with the day to day price there is no reason to sell. Over the long term bitcoin always recovers.

Right now the price is going up on expectations of big money from bitcoin futures, as with any bubble its impossible to say when it will pop, it could happen at $20k or $30k, and the crash might even only go down to around today's levels after that crash. This is the fundamental problem with bubbles, even if you know it's there selling could be a mistake.