I think that only 10% coins/tokens that would be able to survive and will be worth investing in 2021.
There are currently 2400 tokens that are known and many unknown to anyone. By the end of the year 2020, at least 100-200 new tokens will be created. Every day in the world there are 5 new airdrops. I think it is not realistic to calculate. But I'm pretty sure new tokens are being created more than they are being deleted.
But we have to buy only good market capitalization coins. Don't invest money in shit coins.
In my opinion, NFT will be born and develop more than the rate of altcoins that develop utility solely on smart contracts. After AXS hit $1 billion in sales since the launch of their platform, today, CryptoPunks also met their $1 billion in sales from their NFT. This represents a much-awaited advantage and trend from NFT platforms. The possibility that NFT coins will prevail in the future is much more. I quite love NFT platforms