Tyler Gardner grew up eating Cheerios from a bag on a Vermont ski slope while other kids bought hot chocolate. That early lesson about money — absorbed more than taught — sent him on one of the more unconventional paths in personal finance: from stealing grocery money as a kid, to Andover on financial aid, to teaching English at prep schools for a decade, to becoming a financial advisor who thinks most people are asking the wrong question about wealth. The right question, Gardner argues, isn'...