Bip39 Wiki Storing entropy (such as holding a deck of playing cards in a particular shuffled purchase) is unreliable compared to storing a mnemonic. Instead of storing entropy, retail outlet the mnemonic produced in the entropy. Steganography may be valuable when storing the mnemonic. You can see the entire source https://social-medialink.com/story3919341/bip39-txt-everything-about-bip39-phrase