I did not invest on those grounds. I was looking at the stock a few years back and realized SpaceX was underpriced.

My rationale is, when SpaceX actually launches the first Mars mission, the price will go hyperbolic. It will be the stock pump of the century. I estimated what valuation it would hit (~$5 trillion at the time), then looked at the current valuation, realized this will 50x in the next two decades, and concluded it would make a great investment.