Hey Alexmarin,
Blockchain is really cutting edge and growing in the industry. Though you may find researchers working on it, finding colleges offering courses on Blockchain, or those in which it will have a leading role, is difficult.
You can instead choose Entrepreneurial colleges such as IE or Babson, and can then choose to do a research about Blockchain while you are studying. Choosing a school is more about the brand and learning about a certain subject, so these schools are highly reputed for their focus on Entrepreneurship, and their curriculum will give you the freedom to research or create your own company.
Alternatively, any of the top 10 B-Schools can be a good call. They will get into companies which will research into Blockchain. For example: EY and Deloitte have pretty good Blockchain departments.
You can check out the school reviews of IE and Babson to get a better idea of the schools, the curriculum, and the post grad opportunities offered.
IE School Review:
https://www.mim-essay.com/ie-mim-review/Babson School Review:
https://www.mim-essay.com/babson-msel-review/