I also can't say how much money needs to be pumped into the crypto market for a major change to happen, but at this point it seems that supply and demand are fairly balanced, which is consequently reflected in the price.
And here you've touched an important aspect,
current supply and demand.
What we know is that coins keep getting awarded at nearly the same speed (8% faster for this epoch but not that important) and that some assume those checks will drive up demand temporarily since CB posted that tweet.
But, what do we know about the previous demand, is it still there? We still need somebody to buy a part of those newly minted coins (worth around 10k stimulus checks per day) and we still need somebody to buy the usual people cashing out. Is the normal demand still there? Is the selling pressure the same?
Maybe the balance is there but it's mainly because everything has dropped to a standstill, with only a tiny fraction of investment and people clinging to their coins. (forget the volume, we all know it's faked beyond pornstar levels).
In this case, a large influx of money would do far more than previously, but..it's all speculation.
In this case, we can conclude that there is no one who has admitted it publicly (at least not in the forum). Could it be a Frenchman who moved to the US, or maybe a Canadian who went in the same direction? Or maybe France is giving same amount of money

Or, il est un peu d'un troll, un peu trop beaucoup

Probably the guys at the WO have done so and if they haven't then...we're doomed!!! No bull run!!

Oh, and till now, I've never heard of any country doing the same in the EU, free money for everybody, unconditionally.