The fact is that many government agencies have already realized the possibilities of new technologies and fully integrates the blockchain into their systems. This applies not only to the banking system, but also to government structures. It is a pity that certain governments in certain countries have a negative attitude towards cryptocurrency.
Exactly. If Blockchain wasn't a perfect solution for the world, many Banks and governments would've overlooked it. But, they've realized that Blockchain is extremely beneficial towards increasing transparency, reducing corruption/fraud, and lowering costs. When implemented across several well-known industries within the mainstream world, the results are outstanding. Perhaps in the future, if Blockchain technology becomes highly successful, it'll become a part of our daily lives. From healthcare, to transportation, and supply chain management, Blockchain will serve well its purpose.
Nowadays, it's already proven that Blockchain technology can scale towards millions of transactions per second. New consensus algorithms like DPoS and DAG make this widely possible. Within Bitcoin's early days though, Blockchain wasn't as robust as it is right now. As the years passed, many developments came in order to improve Blockchain technology every step of the way. Of course, Blockchain still has its flaws as with any other known technology today. But, it's the best thing around towards helping transform our society for the better.
Nonetheless, I believe that Blockchain technology will become widely adopted by countries worldwide. Those that are too restrictive towards Blockchain, will eventually adopt it as they grasp its benefits. Since it becomes easier to tax and track transactions within a transparent Blockchain, governments could take advantage of the situation. Hence, it's safe to say that Blockchain is the way of the future. Just my opinion