Mark Cuban compared the cryptocurrency boom to the dot-com bubble. In a string of tweets he recommended buyers hedge their bets. He warned them about the dangers of debt in a string of tweets this week. "Watching the cryptos trade, it's EXACTLY like the internet stock bubble." Cuban sold his startup to Yahoo in 1999. He managed to protect his billion-dollar windfall when the market crashed a few months later. "My advice? Learn how to hedge," he tweeted.
