Bip39 Seed. Entropy values need to be sourced from a robust supply of randomness. This means flipping a fair coin, rolling a fair dice, sound measurements and many others. Do NOT use phrases from books, lyrics from tracks, your birthday or steet deal with, keyboard mashing, or anything at all https://bentdirectory.com/listings13112833/bip39-seed-https-linktr-ee-bip39-facts-about-bip39-standard-revealed