it may be that security in government investment is safer than in bitcoin, but I think it will depend on the government. they certainly make certain regulation, which is definitely not the same as bitcoin.
Bitcoin is already secured but i think the coin which will be issued by the government will be more secured.For me,i would rather buy them both,bitcoin and the coin issued by the government.But i won't leave bitcoin behind because it's still the most trusted crypto currency all over the world.And this new coin has no guarantees that it will also lasts long like what bitcoin did.