Token migration from ERC20 TRX to Mainnet TRX will occur between June 21st – June 25th(GMT+8). In 1 :1 ratio. TRX had entered into the top 10 list taking up the 9th spot. The Mainnet comes along with the migration of ERC20 token which is scheduled to 21st June. After this successful migration, Tron will be a potential Ethereum competitor, as mentioned by Justin Sun.