Is this your investment strategy?
I think, old coins are still very potential to develop, they just need additional services and product quality improvement, the smallest example, ETH, ETH as we know it is an old coin whose price is now falling at $ 200, I think ETH can still experience price increases if it is vital to change Ether's vision more broadly, such as creating businesses in the real world, focusing on exchanging ETH alone, or doing swap ETH in a different form than currently available, then the possibility of ETH will develop again, because they don't need to donors as well as new coins.
Don't expect too much from these new projects, you will be disappointed when you find out a token you have high hopes to have price of about $1 each ends up to only have $0.05. You just can't control those investors to keep shorting because after all they bought some tokens for much cheaper. And then there is also the team who are just manipulating the price.
the problem of new coins is in funding, they will be very difficult to develop new coins, they need 1 to 2 years to really be able to face the market as it is today.