There's no advantage to utilizing legacy address. However if the support you're using don’t aid SegWit/Bech32 withdrawals then you might want to use legacy address. Later on you are able to transfer BTC from your legacy addresses to SegWit that starts with bc1. Tron was presumably derezzed and Flynn was https://addurl-directory.com/listings12705362/fake-adress-trc20-for-dummies