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.
10% ? I think it's too big. I am more optimistic only 1-2% because not all coins are able to survive in the crypto market and remember 95% of crypto coins are coins that have no development. only a few crypto coins still survive today. plus new coins created may not necessarily be able to compete in the crypto market in the long term