I don't know how founders and investors of vaping startup sleep with blood in their hands. Outside this epidemic, there is real epidemic among school students making an entire future generation of adults addicted to nicotine.
2) The source for the epidemic of vaping comes from the yearly youth drug survey. And if you look at the survey results, youths are experimenting with vaping in the same numbers as marijuana. And just like with marijuana, the activity is mostly only once or twice a week, not daily smokers. Where's the concern about the "epidemic" of pot smoking among youth? There's ample evidence that smoking pot is much more harmful for youth, both for their mental and physical development.