Countries - India, US, China will have the maximum blockchain developers. All these three countries have the maximum number of software developers. And a significant fraction work in Blockchain and decentralised technology. Even if they are not working, they know what a Blockchain is and how to solve problems using Blockchain.
George Kiknadze
Software Engineer. Oriented on Blockchain technologies.
Estonia is very active about Blockchain technology. They are even using Blockchain in GovTech (several years already).