I think the top 10 coins in marketcap will eventually survive in the future. They already exist before those hundreds of coins are made. They are popular and they are all legit coins that has an interesting project in the future.
I also agree with your opinion
Coins that enter in the top 10 will survive in the market.
Reason 10 coins are still used by many investors.
And it will still be used to invest because the price will continue to rise.