its complicated to analize the peak of bullish cycle or bottom of bearish cycle. our analisys should be wrong but atleast we could minimize the risk that may occur later. the simplest thing we can do only close position when it give us enough profit, take a rest and wait another opportunity.
therefore never go all-in for any of our investments. either buy or sell it. just in case the situation doesn't turn out the way we planned.
short term or long-term players I think know every plan of the altcoin assets they have.