What do you do when your high school senior grandson asks in a nighttime text: Hey Granddaddy, so I know you're probably asleep by now but I just wanted to ask what you think about money. What would be the best way to make the most over a "long" (like 10-20ish years) period of time? Savings, investing, side business es]? Going into the military, having a long period of time being able to save or invest, or build a good...