Is there any cryptocurrencies other than BTC and XMR that people are actually using?
You may be surprised, but I dont even know what is XMR and actually dont want to know. People use BTC and ETH the most. Coinmarketcap clearly shows it
The ranking in coinmarketcap does not prove anything. If you think that being in the top spot means that they are widely used then think again. The ranking in CMC is just based from the total market capitalization of a coin or a token, a mere multiplication of supply and current price. With that said, it won't prove anything.