I don't think so, but interesting idea. If at some point governments decide that they need BTC as central bank reserves, considering the resources they could deploy the most obvious method is probably to develop very efficient ASICs and mine like crazy instead of buying on the open market. Would make for interesting times.
Does China really print a lot of money to pay itself? What about all those excess currencies reserves? They also have a current account surplus, so they are always bringing in extra money. Why the fear of governments printing, especially when it will be unwound at a later date?