Bip39 entropy to mnemonic https://www.symbaloo.com/mix/bookmarks-xfkm Let us think It's going to be 10x more quickly than the GFX card previously mentioned so roughly 2,4M hashes/s. An average attacker will personal a handful of such specialised devices. BIP39 solves this by using human-readable seed phrases made up of natural language words. https://companyspage.com/story5665041/bip39-generator-online-the-smart-trick-of-bip39-wallet-that-no-one-is-discussing-https-dzen-ru-bip39-phrase-com