Bip39 Passphrase Wallet Entropy values have to be sourced from a robust supply of randomness. What this means is flipping a fair coin, rolling a fair dice, noise measurements and so on. Usually do not use phrases from publications, lyrics from tracks, your birthday or steet deal with, keyboard mashing, https://edgarzlvhs.mybuzzblog.com/11032089/bip39-explained-5-tips-about-seed-phrase-generator-you-can-use-today