Hello, crypto exchanges usually have a large selection of different cryptocurrencies, while on other sites you will only find the most popular coins. In addition, exchanges protect users' investments, they have insurance funds and special tools to protect against money laundering and hacker attacks. I can recommend you a crypto exchange at https://crypocto.com/ETH_ERC-20-to-TRX_TRC-20, which is now one of the most popular.