Bip39 Passphrase. It is basic — if you do not worry about copyright inheritance, nobody else will — not your software program or hardware wallet vendors, not your exchanges, and not your wealth managers. What constitutes a "very good wallet" is one which has obvious, simple to entry documentation on https://classifylist.com/story20548116/bip39-https-linktr-ee-bip39-bip39-words-secrets