Well in most developing countries of the world especially in Africa and southern America the battle of a stable currency has been there issue and this countries has sometime serious of inflation and there currency are so weaker can only be accepted for trade within their country.
If bitcoin becomes adopted generally if will Forster a healthy trading ecosystem among countries and also tackle problems of inflation, slow and ineffective transaction processes and even prevent scam and corrupt practices
Bitcoin would be a great help to prevent those corrupt practices but then it cannot perfectly prevent it because there is still the anonymity feature so even if you can trace the transactions, you will not know the people behind those addresses unless they would convert it to fiat and the authorities would then perform a KYC for those who would do so. I don't think bitcoin would be the answer to the issues because no matter what kind of currency the country has, if the root cause of the problem is not solved then those issues would continue.
It can help if they will design a system with a specific and definite use. Since bloclchain and crypto does have a record in every transactions and will get easily to do. But the country needs to be established first especially in technology.
Developing countries has problems when it comes to technology because most likely, there are places when there are even no electricity so it's not possible for them to use cryptocurrency in the first place. They would need to improve first their economic status and help the people in having those prerequisites first before they will focus in improving their economy through the help of cryptocurrencies.