keep holding it is a funny thing. for this time the increase could reach more than 40% has become quite a good achievement. sell in that time has given a considerable profit. especially if it reaches 200% in one night then sold it is the best thing to do than to wait too long for the next fall.
It is possible to see a 200 % increase sometimes(doge did 100 percent recently) and greed will always keep people hooked,but more often than not, loses are incurred as the price often return to the lows after a while. So it is a good deal to sell off some portion of it at least