Quoted from twitter John Mcafee:
"If you are a long term investor you will have no concerns. If you are short term, I can give you no advice, other than short term investers can hope for mediocrity at best, and oblivion at most likely. Great wealth can only be obtained by investing in the future - 2 to 5 years."
https://twitter.com/officialmcafee/status/974104059761299456Be positive brothers!!