In a bull market driven by momentum, hard to tell when it will peak. Your sincerely miss lots of gains selling too early… better winning less than losing 
Market smells of euphoria after Trump victory… not sure how long this euphoria will fade… so take some profits while we can.
Btw, above is for growth portfolio where I trade, I didn’t do anything to the buy n hold (hopefully forever) portfolio which comprise mainly AAPL and S&P index funds/etfs.