that is not right even to think so, it is fact that the price of bitcoin wall coming down to such a low level, bt now falling of bitcoin stop any more because there is a very strong support to bitcoin in 550$ and the price of bitcoin is really trading above 550 USD. and now the people have started buying bitcoin again therefore i am hopeful that the price of bitcoin will increase and not decrease i can expect that the price of bitcoin will easily cross the 1200 USD level at the end of this year 2016.
I do not think the bitcoin price will go below $500 again unless there is another big bad news such as the bitfinex hack.
The probability of that happening is not negligible.
All over the world, exchanges deal with huge amounts of customers' money, and not all of them have fool-proof security measures.
Unfortunately, when some exchange goes under, Bitcoin's price gets affected.
So it is better for the customers to trade at the exchanges, but as soon as they buy the bitcoin, they should withdraw.