You wouldn’t want this step if you could possibly purchase an NFT specifically with Ethereum on your exchange account. Even so the way NFT trade works is somewhat like going to the farmer’s market that isn't going to take cards, this means you’ll want to carry profit your wallet. https://financefeeds.com/dwallet-network-to-enhance-multi-chain-defi-and-gaming-with-zero-trust-protocols-on-aptos/