This experience has happen to many holders/investors, and I was also a victim of this situation. I think patients is just the key to certain of these projects out there. One of the greatest killer of holding some of these coin is Bear market, that is, the btc bear run that even drive the entire crypto market. The btcoin bear run is the killer that bring every altcoins down and their greatest set back is how fast they recover. Like btc, it can recover very fast may be because it has a big community, but must altcoins can hardly recover after a bear run, some time they take too long which lead to loss of confidence and consequently, liquidation of most of these con/tokens