Reasons for Bitcoin's crash today: 1. U.S. stock market dropped before opening, dragging the crypto market down 2. Gold and silver prices fell, triggering market panic 3. Trump launched a new tariff war, imposing high tariffs on planes flying to Canada from Cuba 4. Geopolitical tensions escalated, war between the U.S. and Iran is on the brink 5. Recent large outflows from Bitcoin spot ETFs, with outflows exceeding $2 billion