As an investor, you should expect for risks like this, good times bring you many profits. Instead of questions you try to understand the meaning of bitcoin price fluctuations. Didn't you know that price decrease is giving us an opportunity to make again another rounds of buying. Also what you must look when you are holding bitcoin is long term goals and this price decrease can be recovered. Remember the recent price decrease just days ago, take it as reference, everything's assured that it will eventually increase again. There's nothing to worry, things like this is part of Bitcoin's volatility.