Rather than storing entropy, retail outlet the mnemonic created from the entropy. Steganography may be useful when storing the mnemonic. The random mnemonic generator on this page employs a cryptographically safe random amount generator. The built-in random generator can commonly be trusted much more than your personal intuition about randomness. https://bookmarkpressure.com/story18955990/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator