For those new to Crypto Currency and Blockchain Technology, here are 4 courses offered by UC Berkeley. Course materials are free to the public.

Berkeley offers 4 courses on the subject, all free to access, 2 with certificates. Berkeley has been involved with blockchain for quite a while, and having taken the classes myself I can confirm that they are quite informative on both the cryptocurrency and the blockchain side of things.

https://blockchain.berkeley.edu/courses/

2 are courses are offered through edX that have optional paid certificates available.

2 are courses they offer through University that have publicly accessible course materials on their decal page.