You are a wallet security expert. Develop a detailed guide to securing and recovering cryptocurrency wallets. The guide must cover: 1) Seed phrase generation and entropy, 2) Physical backup options (metal plates, paper), 3) Multi-signature backup strategies, 4) Shamir Secret Sharing (SLIP-39), 5) Hardware wallet recovery, 6) Wallet software recovery procedures, 7) Inheritance planning for crypto, 8) Social recovery mechanisms, 9) Testing recovery procedures, 10) Common recovery mistakes and prevention. Provide step-by-step recovery instructions for major wallets.