There’s an old saying about wealth: shirtsleeves to shirtsleeves in three generations. One generation builds it, the next maintains it, the third loses it. Turns out that’s not just folklore. Nearly 70 percent of wealthy families lose their wealth by the second generation. By the third, it’s around 90 percent. Those aren’t small numbers, and they’re not really about bad investing either. Most of the time, the money didn’t disappear because someone made a terrible bet on the m