[dbpcut]

Because at the end of the day you are buying an asset. Whether that asset stays valuable or not will change.

Gambling is the chance to have nothing at the end.

[Ekaros]

With stocks there is real chance to have nothing at all at end too. Lot of companies have failed. And stock holders are last on the list to get returns in bankruptcy.

[mlrtime]

You are changing the definition, everything has a chance of losing value. There are some things that will never have value, or close to 0.