Education is speculative gambling that teaching the student will amount to them increasing productivity enough to be worth the resources (time, money, supplies) spent educating them. Driving is speculative gambling that reaching your destination faster will be more profitable than the cost of the vehicle, wear and tear, gas/electricity, cost associated with risk of car crash. Eating is speculative gambling that the one eating will provide more value in some way than the value of the food and water they consume.