Bit-coin, Etherum, Ripple, Lite-coin, Dash, Zcash, etc. are the most well accepted currencies which have won the trust of the traders. But a trader must be careful while choosing his trading platform as crypto traders are also facing difficulties due to scam brokers just like forex traders. I don't know actually whether BTC is actually going to crush or not but it is true that the craze for BTC has been diminished to a great extent.
On other hand, cryptocurrencies in general are becoming more and more accepted in the mainstream financial circles. So rather than a crash - or a big sudden rally - there may be a steady if slow move to the upside.