If you need a quick buck, dump them. You can always buy more when you recover financially.
But i always kept my shitcoins in the past. 9 out of 10 would plummet to death, but that 1 that made it, made it big
that is a good suggestion because bad coins will be very risky for a long time it is feared the price will go down again, for now, it is better to buy and save the top coins on the CMC site.
For altcoin, which is indeed unclear, most projects will die. if I had if they had already been lisitng I would definitely sell at any price. than in the future it will not be useful at all because the team will leave the project. so now it's better to multiply investment in a clear project and don't take that risk