Mark Cuban compared the day-trading boom to the dot-com bubble. Here's how he saved his $1.4 billion Yahoo windfall from the crash.

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· *Mark Cuban said the day-trading frenzy reminds him of the months before the dot-com crash in a recent Real Vision interview.*
· *The "Shark Tank" star and Dallas Mavericks owner famously saw the crash coming, and protected most of the $1.4 billion in Yahoo stock he received when he sold his startup to the internet...