CHANGE FOR A $10? The Treasury plans to put a woman on the $10 bill. We don't know who, but people we asked in Times Square still seemed excited about the decision. I feel bad about Alexander Hamilton's demotion. He was a big deal: he helped pass our new Constitution, fought in the American Revolution, rescued the country from debt, and founded the New York Post. Most people don't know this. SHOW ME THE MONEY! Economics confuses people. That's why John Tamny uses entertaining stories from sports, movies, and pop culture to explain basic economics in his new book "Popular Economics: What the Rolling Stones, Downton Abbey, and LeBron James Can Teach You about Economics." UNEQUAL PAYCHECKS: Hillary Clinton complains "the top 25 hedge fund managers mak[e] more than all of America's kindergarten teachers combined." I say, "so what," and explain how the market sets wages. ZERO SAVINGS: 3 out of 5 Americans have no savings, and the average household owes more than $7,000 on their credit cards. Radio host Dave Ramsey counsels people on how to better manage their money. CASH ONLY: Crystal Paine has never used a credit card and avoids debt by paying for everything in cash. GOING BROKE: Politicians should also learn how to manage taxpayers' money. Even though America's $18 trillion debt keeps increasing, many politicians insist on more spending. MY TAKE: Let's eliminate the Washington monopoly on printing money. Let private currencies, like bitcoin or Dogecoin, compete for your business. Choice is always better!