Tron have a good transaction speed and low fees, Only 1 to 2 TRX, it's very low while some other blockchain like ethereum have problems with it, but I'm sure as time goes by, there will be many new projects using Tron ecosystem, so far Tron has been used for fast and cheap transactions to avoid high gas fees, but when new projects heavily use the Tron Blockchain, that's when Tron will be in the top 5 cmc list.