For trading on Loopring Exchange, you need to be on a layer-2 network, and setup requires a layer-2 web 3.0 digital wallet such as MetaMask, which is an online Ethereum wallet that acts as a bridge between crypto-assets and decentralized applications, and comes as an extension for your browser. Gas fees for Layer 2 systems are virtually nonexistent, however depositing digital assets outside the Layer 2 network does require a fee, and once you pay the deposit fee, your Layer 2 assets will be free from additional fees until you quit.