It has to be said. Its common sense. There are thousands of coins. Scamcoin, losercoin, Shiba coin. All real coins btw.
Yes there will be a couple coins that are very valuable in a couple years but the vast majority of them will be worthless.
Only coins that do things will be valuable. Coins that you have that are just there to hopefully go up on value so you can profit will be worthless.
Its like the dot com boom. You are betting on websites. Which website is going to get the most visitors. Most died.
You're right because I have a lot of worthless coin in my wallet, there is more than half Million others are hundred thousand above. It can't be use anymore and just a decoration in my wallet and remembrance in such coin. That's why if you want to invest, always be careful and learn it very well so that it will not become useless in the future.
The chance to continue progressing is slim for those coins who don't have much support from the community, eventually they will die and be forgotten,
Remember that if you are into investing always look for the usages and what addition the coin you are supporting to the entire industry, if there's none be aware that even the project is hot now if that is unsustainable it will die without any community supports,
Developers also have the influenced, best to check their résumé if how good they are within the business.