In my own perspective, it is but not too much. Well I am gaining from it due to investing in nft's, mining coins like eth and other free stuffs like bounties. As far as I am concerned it will help a little due to taxes that I pay to the government since you've said a developing country. I am very much sure that my tax won't be wasted and even it is still a little it will help.

About hindrance, I don't surely get the basics of economy as I don't really know, what I can say it there are disadvantages in all investments specially with this kind, so volatile. If somehow it drags a growth of a country well see the news everywhere where scams and hacks are rampant, I don't really know the impact of it but as we can see it creates problems to the state because we all know blockchain is somehow giving authorities a hard time to deal with the bad guys.