China bans ICOs and cryptocurrency to fiat exchange in the country for now that is the reason behind the drop. You may dump as well If you like to because there are too much uncertainty in the market.
If crypto really is a treat to bank tyranny, i am surprised it is taking that long for them to ban the BTC exchanges.
So the BTC ban actually is a good sign, it means crypto can really replace bank accounts and they don't like it.
We should expect such a ban and similar failures of crypto-related centralized services, because centralized services are easily attackable.
They have invented a decentralized money just to avoid such problems, and we are still using centralized services??
We should change mentality, we should start preferring more untraceable ways of doing things at the expense of some user friendliness.
Often the easiest way is not the safest.
For example buying with credit card it's easy but the drawback is... they know what you bought and how much you transacted.