Anyone, regardless of their place of residence, has been able to invest in Bitcoin without the approval of any state for the past 16 years. The idea behind Bitcoin is that states cannot stop or interfere with the operation of the Bitcoin network. Personally, I do not see any positive changes in the use of Bitcoin compared to the time when many governments did not regulate the cryptocurrency sector and considered Bitcoin to be an asset that was about to lose investor interest.
Sooner or later, it would have happened anyways, BTC wouldn't be able to be left without their notice for all of their time being in the seats.
So.. the adoption would still happen, but it would be a much slower one, with what we are getting rolling into - it will be faster, but with their specifics and rules.