The Dow Jones and Standard & Poor’s 500 indexes reached record highs on Thursday, having completely erased the losses since the stock market’s last peak, in 2007. But instead of cheering, we should be very afraid. Over the last 13 years, the stock market has twice crashed and touched off a recession: American households lost $5 trillion in the 2000 dot-com bust and more than $7 trillion in the 2007 housing crash. Sooner or later — within a few years, I predict — this latest Wall Street bubble, inflated by an egregious flood of phony money from the Federal Reserve rather than real economic gains, will explode, too.