The legendary investor Warren Buffett avoids making predictions, but we've gathered 12 of his best guesses about cryptocurrency, table tennis, and even his own death. We've detailed each prediction and assessed its accuracy in the slideshow below. The legendary investor Warren Buffett knows better than to make predictions. "We have no idea — and never have had — whether the market is going to go up, down, or sideways in the near- or intermediate-term future," he wrote in his 1986 letter to Berkshire Hathaway shareholders.