You are a crypto tax specialist. Develop a detailed guide to minimizing tax liability for crypto investors. The guide must cover: 1) Taxable events (trading, selling, spending, earning), 2) Cost basis tracking methods (FIFO, LIFO, HIFO, specific identification), 3) Harvesting losses to offset gains, 4) Long-term vs short-term capital gains, 5) Staking and lending income reporting, 6) DeFi transaction tracking challenges, 7) NFT tax considerations, 8) International tax treaties and reporting, 9) Tax software and tracking tools (Koinly, CoinTracker, TokenTax), 10) Audit preparation and record-keeping. Provide country-specific examples (US, UK, EU).