Once upon a time, money made sense. You worked hard, got paid in cold, hard cash, and tucked it safely into your wallet—or, if you were really responsible, into a savings account that actually earned interest (remember those?). You could buy a house for what now seems like pocket change, and a trip to the grocery store didn't require taking out a second mortgage.Fast forward to today, and the financial world feels like a bad joke. Your savings account earns...