Mr. Buffett's speech is still worth watching, and I'm curious about what good opportunity has prompted him to spend $10 billion in cash reserves recently. Key points of speech: 1. Resignation Plan Buffett plans to officially announce this decision to the board of directors on Sunday. Next, he stated that the board of directors can decide on the best follow-up arrangements and make necessary adjustments. Buffett's plan is to step down before the end of the year.