By that definition, everything is gambling, because all activities involve risk. Even keeping your money in an FDIC-insured bank account doesn't protect against inflation risk, or against the risk of the U.S. government or financial system collapsing. So this definition of "gambling" is useless for practical purposes and we should pick a better one (or just stop using the word in this kind of discourse, since it tends to confuse people and provoke semantic disputes).