You definitely should read the thread

As I have explained on a few occasions already that volatility is not something that merchants should care about. In simple terms, merchants don't accept cryptocurrencies directly in general (some certainly do but they are few and far in between). Most merchants which are accepting cryptocurrencies as payment are still accepting fiat as before. It is payment processors which receive crypto from buyers and then covert it to fiat, and it is them who are dealing with volatility issues (i.e. not merchants)

That's right, I'm living in a developing country and I can say we already have Bitcoin ATM machine though its still not that popular but I know there will be more development like this. Yes, in time many countries will support cryptocurrency and many project will have their own ATM's machine to give convenience to the investors and newbies, it will happen no matter what.

Of course the government should be the first to check whether there is restrictions for cryptocurrency or not. Now, the hardest part is the adaption of people in a certain country especially the third world countries. Companies who build Bitcoin ATMs might have a survey on their targeted location for the next machine deployment, and I guess it will be the mass adaption is the first thing to be tackled.