For me this is the perfect time to go buy some cheap alts like neo,waves,qtum,ethereum and other solid coins the price is very cheap and it can give you a lot of profits few hours from now.
This is the periodicity of the market after exactly one year, you can track this on the bitcoin candlestick chart. If you sell bitcoin then that is a very wrong decision, if you can buy more bitcoin because you will not be able to buy bitcoin at any time in 2018 but low price as today . Believe this.