Once this role get's formalised, we will see a Bitcoin pump like we have never seen before. Every nation on planet earth will follow Trump and the United States government so they are not left behind.
Every nation? Does that include all those who will lose a lot of money due to the restart of the trade wars? Not everyone is thrilled with the new policy that will be implemented from the US - and even fewer are thrilled with the idea of including something volatile like BTC in their strategic reserves.
In addition, if all those countries you are talking about will collect millions of BTC, what will be left for ordinary people who will want to buy BTC in the future?