To me I believe that bitcoin and blockchain technology can be of help to poor countries with inadequate infrastructures in numerous ways, if been legalise in those countries.
Could you also believe that bitcoin related projects can make poor countries develop their internet infrastructures, improving connectivity and access to informations, if been ligalise.
Poor countries have their issues nationwide that need to be resolved first. Like if they have problems with infrastructures for the Internet, they have to fix it, and Bitcoin can not help Internet infrastructures there. The same with other social, economic, political things in those nations, that are not Bitcoin responsibility and Bitcoin can not help.
After they fix national problems, they can join Bitcoin party as Bitcoin miners like Bhutan or purely investors like El Salvador. They have to change themselves and their nations first, then Bitcoin is accessible for them to boost changes and can be one of contributors to their national economic growth and other improvements.