A Bitcoin Reserve doesn't mean they'll create a Bitcoin Standard, just like having Gold Reserves does't mean there's a Gold Standard.
Having gold is not equivalent to buying gold. The gold reserves in Fort Knox are not kept as an investment or as a justification to pay out the 40 trillion dollars worth of debt when gold reaches $1M / oz. They're kept for legacy reasons. But, buying bitcoin as a plan to pay out the debt, clearly encourages everyone to follow, and do the same with their debt. This week I read that Japan and Thailand are thinking of either buying bitcoin as strategy or propose a legal tender.
If it's not obvious yet: I finally started reading The Bitcoin Standard ebook.
Fantastic book, and fantastic trilogy. (Fiat standard, Principles of Economics.)
I would think that there is going to be an attempt to harness and control bitcoin, but that does not mean that the attempt is going to be successful. Surely, the more and more that bitcoin is held in the hands of BIGGER institutions, then there may be attempts to make self-custody illegal and/or very difficult... but that does not mean that they are going to be successful in that, either.
The best strategy they have, in my opinion, is to buy all the bitcoin. There's no other endgame. Putting themselves in the top of bitcoin holders would make it much easier to re-establish your position as a money master.