There isn't a advantage to working with legacy address. However When the provider you happen to be making use of don’t help SegWit/Bech32 withdrawals then you might want to use legacy address. Later you can transfer BTC out of your legacy addresses to SegWit that starts with bc1. The steps https://weballdirectorys.com/listings215043/the-tron-vanity-address-generator-diaries