Would i save money on withdraw fees? It seem yes but isn't the issue of when i want to send BUSD to an exchange, i have to pay ETH fees like the current altcoin I own because I read BUSD is an ETH coin?
Or it isn't?
If you want to trade decentralized, then withdraw them to Optimism, Arbitrum or Polygon (Ethereum level 2 solutions), depending on what your exchange supports.
At Polygon, the commission is paid in MATIC tokens, at Optimism and Arbitrum in Ethereum. So you will need to make 2 withdrawal (ETH+stablecoins or MATIC+stablecoins)