In my opinion, the cryptocurrency that has low transaction fees is Usdt Tron. Because USDT TRON there is no Gas fee like in Ethereum. Apart from low gas costs TRX also has a transaction fee model which is used to store information on the blockchain.
TRX is a blockchain-based decentralized protocol that only focuses on the goal of building a worldwide free content entertainment ecosystem, with blockchain and distributed storage technology.
And TRON also has a USDT TRON which is free. I often move my assets using usdt tron, besides there are no excess fees, it is also very fast, it only takes 30 seconds.