Bip39 Entropy values need to be sourced from a strong source of randomness. This implies flipping a good coin, rolling a good dice, sounds measurements etcetera. Do NOT use phrases from books, lyrics from songs, your birthday or steet address, keyboard mashing, or anything you think that is random, simply https://finances-publiques05049.tinyblogging.com/bitcoin-seed-phrase-generator-the-2-minute-rule-for-bip39-75136271