(Nobody who invests in Bitcoin has any influence on the outcome, for instance).
The difference in all of them is simply the amount of information one possesses.
Nope with Bitcoin you can go to a lender and get Interest, I gamble, betting on a horse and no one will cash out before the event happens.
Betting in a horse you can freely exchange with betting on whatever else.
Same with shares you hold a value, a bet is only a value for the bookmaker.