Bip39 Standard. It really is very simple — if you do not concern yourself with copyright inheritance, no person else will — not your software program or hardware wallet suppliers, not your exchanges, rather than your wealth managers. No, there is no technical limit to the duration of your passphrase. https://bookmarkspring.com/story13940114/bip-39-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone