https://www.google.co.uk/amp/www.theverge.com/platform/amp/2017/3/10/14883350/sec-bitcoin-etf-order-winklevoss-denied
£180 drop in minutes.
Probably good time to buy
It's already recovered 50% of the drop!
http://www.coindesk.com/price/
Markets are crazy beasts, i tried Forex a few years ago, turned £50 into £150 in 2 days then on the third day had £5 left. Far too risky to play with, especially with weekend resets and the other mechanisms by which they make it harder.