He said that Pinterest CEO Ben Silbermann showed him the platform about three or four years ago, offering him an angel investment opportunity at a $5 million valuation. “At the time I thought, wow, that’s really high,” Rose said. He called Pinterest “the one that will forever have got away” and confirmed that the startup had seen “really decent traction” at that point.

Sorry, Kevin, but fortune favors the bold.

Entrepreneurs: Be weary of taking an investment from someone who thinks "wow this valuation is high" when s/he should be thinking "wow this market opportunity is HUGE".