What was behind the Ethereum flash crash of 6/21/17?
The ethereum network has massive amount of backlog due to the Status ICO yesterday. Due to the fact transactions are delayed for 2 days now, fear is building up and people are trying to sell Ethereum right now. This also happened prior when Bankcorp had their ICO too. It is unknown why these ICOs are triggering backlog and delayed transactions.
It might be a good time to pick up some Eth depending on how much it falls.
** Here are the places I would recommend.**
http://cryptosrus.com/buy-and-sell/