There's simply not much things you can spend crypto on if you're in a 3rd world country besides digital stuff.
Don't know for other third world countries outside African but those in African are getting a taste of what it like to transact using crypto. Although the government haven't approved it yet as those services aren't offical but things are been bought mostly through peer2peer with some additional centralized service providers. We now have shoe, cloths, bags etc shopping plugs that accept cryptocurency payment. These are boutique own by individual with interest in the crypto space and I also know of online services that offers cable and mobile bills while accepting cryptocurrency but all these aren't offical yet.
I'd say however, the best thing to buy with crypto is simply more crypto! 
Funny but true to some extent although you should never make the mistakes of buying altcoins with Bitcoin instead buy altcoins with fiats and trade them for Bitcoin when you get yourself some decent profits. Reason been that altcoins deprecate in value when viewed in satoshi even though it's appreciating in fiats value over a long period.
