Well this happen to me a long time to hold and forget to sell lmao 
and in the end the coin I hold is ended up being a scam so I got nothing. I agree when we can sell the coin so we can buy top 10 altcoins or bitcoin the safest crypto rather than long term hold a project that can be scammed anytime. I'm not sad when that happens but that becomes an experience for me so I can decide the best move for next coin/token.
It should be noted that if the coin you are holding is not a good coin then when there is value and it is good enough for you then I think at that time sell it, because there is no need to hold it any longer, in the end, it becomes a useless coin with nothing the value, I always throw away new coins even though the price is quite decent because for me coins that are not popular will tend to be a scam if held for longer. and in the end the coin I hold is ended up being a scam so I got nothing. I agree when we can sell the coin so we can buy top 10 altcoins or bitcoin the safest crypto rather than long term hold a project that can be scammed anytime. I'm not sad when that happens but that becomes an experience for me so I can decide the best move for next coin/token.Nothing but moving it to the main coin, namely Bitcoin.