While a lot of people might be looking at the markets today and start panicking, you have to remember that crashes and dips are not only normal they are a part of the game. Every time Ether has fallen it has gotten right back up again usually stronger than before!
Hilariously if you check https://cointelegraph.com/ethereum-price-index you will see that the price has fallen only back to where it was at the beginning of this month! I personally saw it fall to 131$ a few weeks ago then rising up 100+ in just over 2 weeks. The big investors right now are not even worried, they are happy... Why? because they are buying Ether for CHEAP and planning to make large profits in a month when the price slingshots back!
Now Ether might fall a bit further... but it will go back up! Why? because the world leaders are interested in Ethereum not bitcoin look for yourself http://www.zerohedge.com/news/2017-06-12/putin-meets-ethereum-founder-create-national-virtual-currency. Any government that is talking about bitcoin will switch to Ethereum given time because ethereum is a better coin... Lower fees and faster transfer times.
Best advice is to either watch Ether and wait for the price to start going back up then buy. Or to put a bunch of buy/stop orders at a lower price.
Keep Calm and HOLD THAT ETHER!