The markets have had us blasting Katy Perry's "Hot N Cold" on repeat, which means a HerMoney Headline is in order. In this Friday special, we bring back my friend David Bach. He's a personal finance superstar and author of the bestseller "Smart Couples Finish Rich" (which he just released a new edition of). We answer all of your questions on how to handle volatile markets (and trying to time them). We also discuss whether to dip a toe into Bitcoin or one of the other cryptocurrencies (and what to tell your kids when they start asking about it). Email us your questions at JeanChatzky.com — and have a great weekend.