What if all those big corporates and businesses starts using crypto as a mode of payment just to avoid tax which will cause a direct loss to the government which uses tax for the betterment of the country. This might not affect corrupt countries as it doesn't matter because tax money goes to politician's coffers but what about developed nations?
In my opinion, it will have a rather bad effect on the economy in general, not in particular with corrupt countries. Because humans are not controlled by the law, we will turn into a more evil and more ambitious person. then people will no longer use fiat money, they will directly use crypto to manipulate like the whales did and will make the decentralized market spark. That is also the consequence that governments around the world do not want, so they have to make quite a lot of laws for crypto.
They will try to make laws for crypto, and that laws will work for some time. Crypto is safer and faster, with one word crypto is better, and of course that in long run crypto will boost not just economy, blockchain offer solutions for many other fields.
Transparency is what I like most about decentralized blockchain projects, it's what this world needs. It's the near end of playing hide & seek with our governments who make wars in our name, build guns and benefit the rich class.