The Bitcoin market is now at $60000 so we can see that the market has risen a lot.  When the market reached $50,000 it was a good time to invest.  Those who have invested can leave their investment if they want for short term.    And if he wants to keep it, he can keep it.    Maybe the market may go down again if it goes down then I suggest to invest and if the market goes up then instead of waiting to invest using DCA method.