Even Satoshi’s stack is in legacy address. These addresses are Pretty much in essence recognized by any assistance inside the Bitcoin ecosystem. If you see invalid BTC address mistake on an Trade company in which you’re initiating the send out, then more than likely they do not support SegWit transaction. https://directory-legit.com/listings12702924/helping-the-others-realize-the-advantages-of-what-is-a-rarity-address