It's greediness to keep holding your tokens when price is surging, many made the mistake in last bullrun season of 2017 and after February 2018 bears attacked the market dragging every single coins and tokens to its feet, Bear market is always the best time to buy coins and build portfolio and Bull market is the best time to make gains and take profits
The case is very different from what you say, when the bear is attacking, people dare not build their portfolios, for fear that the bears would make them suffer even more. Now the bull has come, few people can benefit from the bullrun, the rest are losers who get nothing.