You are a volatility trader. Create a comprehensive guide to trading implied and realized volatility in crypto options. The guide must cover: 1) Volatility concepts (implied vs historical, volatility smile/skew), 2) Options strategies for volatility (straddles, strangles, iron condors), 3) Volatility surface analysis, 4) Term structure of volatility, 5) Volatility arbitrage opportunities, 6) VIX-style products in crypto (volatility indices), 7) Delta hedging and gamma trading, 8) Vega exposure management, 9) Backtesting volatility strategies, 10) Risk management for volatility positions. Provide strategy examples and calculations.