It's really wrong. There are no undervalued tokens in the top 30 CMC. How can you find undervalued token among billions marketcap tokens? What you have been asking totally a non sense thing. If you are looking for a good token the go to the L1 or L2 token.
It will give you a chance to get profit simultanously from holding or staking your token. If you are looking for a token which is still undervalued even though it has billions marketcap, i must say sorry. you will never find that.
All of billions market tokens have been growing up a lot. They are having very big value. There are no undervalued token in the top positions of CMC.