Downside volatility is inevitable in a parabolic rally. Price moves far and fast on low liquidity, and once the music stops: shorts have already been squeezed/margin called, short term speculation dries up, and long term investors are waiting far, far below near the long term trends.
In particular, the mom and pop variety of investor that is entering the market now is prone to panic. The crash will come eventually, although I doubt we'll see sub-$3000 coins again. If we do, it won't be for long. I'm glad I haven't sold any coins, but I also have some fiat money waiting to enter the market for the long term. And it won't be up here above $17,000.