I'm not really sure about your other questions, because i'm not too well-versed in economy... but from a theoretical perspective, if there's a struggling country that suddenly goes all-in on bitcoin and crypto, it could do absolute wonders for that country.
You'll suddenly have a whole country advertising safe haven for crypto investors. The country could enact governmental programs to fund crypto exchange startups, and bitcoin/crypto integration into commerce. Basically, you'd have a crypto-friendly nation that would attract crypto investors worldwide.
It's kind of like how the Swiss attract rich people to their banks because of their unique financial freedom.
So while the rest of the world is banning crypto exchanges, crypto mining, or otherwise just making it impossible for people to buy,sell,use, or trade crypto... you have this goldmine of a country that's opening its arms wide to the world and its crypto-friendly atmosphere.
The crypto exchange revenue alone would be enough to bump the country's ecosystem.
Again, I'm not well-versed in these matters, but they could also help crypto investors bypass their local ICO investing restrictions by acting as a mediator or some kind of loophole where the crypto investors are buying a 1:1 product from the country, but they also get ICO tokens from the ICO they're trying to invest in. <-- something like that, so it's like on the surface, they're buying a product and getting an ICO token as a bonus. When in reality it's the ICO token that the buyers really want
Now, I don't know about you, but if you're from the US or some country where ICO investing is banned... wouldn't you spend the extra 10% to purchase the country's product in order to get the ICO you want to invest in knowing that that ICO has a chance to 40x like all the others?
That kind of deal works so well for that country because they're suddenly selling a physical local product, while also probably charging some kind of handler's fee/tax for selling the ICO token (of course well-shielded into the fees/taxes price).
All these crypto programs could literally take a country out of poverty overnight with the upcoming crypto craze that we all know is going to happen.
Just think about Africa, and how their main income source is tourism... if a country adopts crypto like this, their main income source could be crypto.