No, if you actually know something about the value of treasuries in the future, there is a fortune for you to make in the financial market.
If you merely think you know something about the value of treasuries in the future, that's a different story.
But, anyway, the grandparent post wasn't expressing knowing something about the value of treasuries in the future, they were expressing a perception of risk, which is exactly the opposite.
(You don't need an actual default for the credit default protection to appreciate in value, just more of a perception that the risk of a default has gone up.)
See also http://www.bloomberg.com/view/articles/2013-09-26/why-would-...
You could also purchase PUT options on a bond ETF like TLT where the counter-party will be the OCC, which will have little exposure to the turmoil in the bond market like a bank that would underwrite a CDS.
I dunno. I mean, US government debt is conceptually subject to both US monetary risks (the same as US dollars) and US government fiscal risks, so US government (dollar-denominated) debt must always be (even if only infinitesimally) less safe than at least one fiat currency, to wit, the US dollar.
Certainly in the last decade they are near indistinguishable.
https://bankunderground.co.uk/2015/08/28/the-special-relatio...