Late 2017 and early 2018 i was holding lots of coins and tokens from the ico's in that some i really trusted with solution and team (not only me most of crypto community trusted). Now this coins or token became nothing . But some projects i entered to sell for small margin profit these projects given profit . So holding token or coin for long term is meaningless.
As your experience if you sell your coins now, you will be disappointed again. Take your steps as cryptocurrency market situations. Unfortunately, at that time I lost a lot of money for holding tokens and coins. Always fix the selling price before you buy any coins. To buy coins, a price dump should be needed. I don't think now any projects will ruin your money and time.
That's right, We should always consider the situation and the environment especially if you are investing in assets with value, It's like in our situation right now. Most stock assets are greatly affected by this pandemic which causes some assets to fall into their all-time low. OP's situation before was the worst timing to hold some crypto assets because the hype of bitcoin was starting to faze and it causes altcoins to go dump also, As of now there are tokens that never recovered from the disaster back then, I also hold some tokens that never recovered from that situation and all I can do is move on from it. I just accepted it just like I was out of luck and dumb that time trusting different projects that they can recover.