if from what you said, i don't think that any president really wants a decentralized system like what bitcoin brings. they only see bitcoin as a trading instrument or investment.
i do not even think governments think of bitcoin as a currency to trade and to transact with because they see it as something to make profit out of
of course this is because they think their countries' currencies are what the superior currency are and they would rather for their citizens and everyone else in the world to use their currency instead of cryptocurrencies even if it is bitcoin
Bitcoin would be seen by such people as such due to them not being interested in the details about it.
Why do it while having all the other means of doing things already being there? It's logical for them, but not good for the perception about BTC.