for old coins, I also can't hold it because it's too risky to keep it for a long time especially with the current cryptocurrency market conditions.
There were a lot altcoins and for time the numbers of altcoins are increasing day by day. As above mentioned most investors don't prefer to hold old altcoins for a long term, that is why as you know most of them are dead. It is so risky to hold them, it is wasting-time. l don't think that most of them can have good future, but everything is possible in crypto space.