I don't know if governments would want something like Bitcoin to be accumulated by them. Imagine a centralized entity using a decentralized currency. There are a couple of things that governments would not like about bitcoin.

• The Trust that it has value.
  • Imagine FIAT currency, they have value because the government says they have value
  • They want it to be backed with tangible assets
• They want control over the currency (which is not possible for Bitcoin)
• They can't control the maximum supply
• Crime Concerns (with all the media and news surrounding it, I don't know if they will trust it)

I think there are more to be discussed, but that's just came from the top of my head. I believe they have other concerns rather than this one. Unless the Leader of that country believes in the currency, that would be a different story all over.

but why?
every conspiracy theory in my opinion should not just talk about what ifs but why. otherwise there is no end to crazy things you can come up with!
i personally can't see any incentive for the governments to accumulate bitcoin.
if it is for  control, there are a lot of different ways they could control bitcoin (eg banning its usage) or its market (by injecting fiat that they print in it),...
if it is for money, similarly there are other better ways of making money. governments don't concern themselves with this type of profit!

I think for me some countries are really accepting and accumulating bitcoin and maybe others are not. Everyone knows that bitcoin are plenty of benifits and other uses really worth it.

I doubt any such thing is happening!! North Korea is ruled under a dictatorship so can't tell for sure! But for the other governments, it seems impossible! Countries believe in a centralized economy and bitcoin or any other cryptos are directly against that centralized value! So they would not "waste" their "valuable" fiat against something that directly contradicts with their own belief!

For N. KOREA, it may be possible because they simply don't bother about the rest of the world!

Nations, States and Government are dynamic entities and they changes over time. So, I don't think any of them would accumulate bitcoin as such. If they do, they'd do in privately.
We have seen rich Chinese and Russians buying bitcoin to hide their wealth from the state. Large political leaders in Venezuela and North Korea buying bitcoins for a secure future.
And it could be similar in everywhere else.

The same as with gold reserves, but without the incurred costs of custody and storage, or transport...

As long as they learned how to properly make and handle cold wallets its the smart move to do for long term preserving of value.

maybe not today since bitcoin is still so new and unproven.

but think about the big picture. what's gonna happen if reserve currencies start collapsing? let's say the USA government defaults on its debt and the entire world starts unwinding their USD exposure. chances are this would create liquidity crises in multiple major economies. we could see the collapse of several major fiat currencies in succession.

smart governments are hedging against this eventuality by accumulating gold. in a global currency reset, chances are we will return to the pre-fiat systems of asset-backed money, so gold will be an obvious hedge. but theoretically this relationship should extend to other assets, especially for capital liquidity purposes---the global economy can't just be restricted to the gold supply. in a decade or three (which is a realistic time frame for a USA default) bitcoin could definitely be one of those assets.

Maybe, the governments are accumulating Bitcoins in order to study it. In order to prevent bad things that might happen. We all know Bitcoin is semi-anonymous. The government will use Bitcoin in order to detect those criminals that use Bitcoin. I mean, not just in North Korea but in the other country as well.

But I believe that some politicians are accumulating Bitcoin for the reason of profit.

Accumulating BTC to study the cryptocurrency? How does that even make sense?

Bad actions and criminals will never be prevented. They'll always find a way and no matter what currency they have to work with, they'll do it. If a man has an evil mindset, you can't stop it. BTC is used for crimes less than fiat, trust me.