[Aunche]

There is always going to be some degree of uncertainty with any action. Just because a meteor can fall on your head if you walk outside doesn't make it a gamble to do so. There's a fine line between investing and gambling, but the extreme ends of the spectrum should be obvious.

[darawk]

I'd argue that the difference between investing and gambling is that gambling has known negative expected value, whereas investing is uncertain. If it is not known that the outcome of a gamble has negative EV, then a reasonable case can be made that it is an investment.