Depending on the use case of the coin and how the teams promote the benefits of their coin. If they keep to developing new product and follow the trend of market, they will be survive from the market, because the interesting of the project increasing. Let see old coin of Cloack coin, the price still in the bottomed although the market on bull market because the don't have others products that interest to see. With high competition on the market, more altcoin can be dying.
That's right, and in the past too many coins died because there was no use and benefits to be gained from these coins, and actually every year there are always coins that die because their development is not smooth and the demand is low.
A natural thing that happens because there will be coins that grow and die every year. I've also held some old coins that ended very sadly. The coin undergoes a gradual decline and ends up being up. Many things you will go through later with what you have held. but I'm sure there will be 1 coin that makes you lucky and make a profit.