Many big cryptocurrency markets have been shaken by regulators because according to them there is a big risk factor of money being used for Illicit purposes like money laundering, etc. Joint Bitcoin analysis team of FDD and Ellicit(Bitcoin forensics company), indicates that less than one percent of all Bitcoin transactions involve money laundering.
The report says as follows : "The amount of observed Bitcoin laundering is small and darknet marketplaces such as Silk Road and, later, AlphaBay are generally the source of almost all of the illicit Bitcoins laundered through conversion services.”
I think the crypto-critics should calm down & help regulators to solve the real problems such as proper KYC & tracing transactions & not just thinking of sitting down the whole market all together as some desires. I personally don't think that till now there is any man-made invention which cannot be used wrongly but, we don't destroy them but just try to keep them away from being used for the wrong purposes.
Let's just hope with our fingers crossed that we get a future where cryptocurrency is very well regulated & no such big market fluctuations & stress to investors comes back.