Quantitative vs. qualitative, right? Market cap doesn't mean anything in terms of crypto, or even stocks for that matter. Certainly, it's good to have a high market cap. But just because one is higher than the other doesn't necessarily make it superior. It might even mean the trade is crowded!
There are more important things that investors should consider, like the security of the system. The transaction ability, the blockchain, the protection. They want to make sure that their money is safe, not that everyone else puts their money in the same place. This kind of ranking is hard to do, however.