By Daniel Kline Down markets are when people get rich. Here’s how you can be like Warren Buffett. Nobody knows when a stock (or the stock market) has hit bottom. People can speculate — and every analyst hoping for a little bit of television fame most certainly will — but no person, no matter how many past predictions they claim to have gotten right knows when a stock or the market has fallen as low as it will go. And, while it’s tempting as an investor to wait for better prices, that’s a dangerous game to play. Yes, you might get a better price by waiting, but you also may find yourself wait…