Health insurers would lose $1 trillion in revenues -- that's one million dollars one million times -- between 2013 and 2020 if ObamaCare is completely overturned, according to Bloomberg Government. Sarah Kliff at the Washington Post tells the tale [emphasis added]:

The majority of that loss - $880 billion - would be from the 16 million Americans expected to purchase coverage on the individual market. Two-thirds of that revenue would be in the form of federal subsidies, for low- and middle-income Americans to purchase coverage. The rest would come from individuals, responsible for whatever part of the premium subsidies do not cover.

Another $220 billion would be lost from the Medicaid expansion, where states have often turned to insurers to manage the entitlement program.

That's $800 billion in taxpayer money lost by insurers if the Obama administration fails.