I know two coins/tokens that are stuck there : Hex and Kadena. Hex's market cap is highly inflated because lots of tokens are locked for years and Richard Heart owns an estimate of about 90% of the supply. The liquidity of Hex is below 100 million in total I believe, so it's purported market cap of 10s of billions is deceitful.
Kadena, on the other hand, has healthy liquidity and volume for its market cap and it's a perfectly legit token. It's listed normally by CoinGecko. It just so happens CMC has certain requirements before it lists a token in the top 200 (source :
https://support.coinmarketcap.com/hc/en-us/articles/360043836851-Ranking-Market-Pair-Cryptoasset-).
Top 200 Rank: The project must minimally have a CMC-verified market capitalization and fulfill the requirements outlined in (1) - (5) above.
Top 201 Rank and beyond: The project must minimally have a CMC-verified market capitalization but does not need to fulfill the requirements in (1) - (5) above.
Unranked: Cryptoassets without a CMC-verified market capitalization sorted by 24h trading volume.