Many of the coins in the top 10 have less activity on their social media than BCH. Even r/ethereum has only 800k subscribers compared to 500k on r/btc, yet it is priced at 20x the BCH market share.

2 more examples, uniswap and polkadot havent even bothered to pay for bots to subscribe to their subreddits like some of the others have.

BCH has lots of room to grow in valuation.

Litecoin only has one selling point which is that it is in the top 10 cryptos, they are barely keeping it in there, and once it falls out it is done, their community is much smaller and less active than BCH.

I think many projects have decided as part of their marketing strategy, to dedicate a significant amount of money to keep their coins in the top ten Cryptos, and they are willing to burn through lots of their funds to try keep it there.