It’s no big secret that smoking is terrible for your health, but according to a new study, it’s also really bad for your pocketbook. The financial social network WalletHub looked at the combined cost of insurance increases, healthcare prices and loss of income due to health issues related to smoking, and then added that to the amount of money smokers spend on cigarettes instead of investing. They found that over the course of a lifetime (from 18-69) American smokers lost more than $1 million because of their habit. In some states, where health care and tobacco costs are higher, that number is closer to $2 million. In other words, there’s another good reason to go ahead and kick the habit …