4) Central banks purchasing Bitcoin to secure a countries wealth, and for Macroeconomic trade
i don't think this can happen that easily of even soon because in a lot of countries it is illegal for the banks to buy bitcoin even though bitcoin itself is legal and individuals are allowed to buy it.
in any case news like this only gives me a ticking clock as the time is running out to buy cheap coins before the gigantic whales start pouring into bitcoin that would also make the current whales look like little fishes.