It can't, because it's based on very shaky speculation. I'm pretty sure no one wholeheartedly believes this, considering Bitcoin's recent woes and how large the amount is. They probably can't risk all of that, especially because they aren't even doing well financially in the first place. If it does happen though, I'd expect a furious bull run. I mean, Bitcoin as a reserve currency? Sign me up lol.
Large entities usually tend to stock up on whatever they plan to buy in, then have news outlets start with what seems to be an empty rumor, where after that the entities themselves confirm the rumors.
It's basically like how people here have been waiting for years to see institutions enter, while they very well may have entered already. By the time they say that they are going to buy Bitcoin, know that they are done buying....
We'll see where this goes, but as it is right now, the mass doesn't take anything of this serious, so there might be a sweet counter move looming where Russia pops up out of nothing.