No one has the full knowledge of bitcoin, talk more to having an institute that issues out certificate on bitcoin course. Bitcoin is very broad that it can't be learnt for three years.
I think there are quite a lot of people with comprehensive knowledge of Bitcoin, you could find many even on this forum. In it's nature, I don't think it's that complicated. The real difficulties arise when you want to make changes to the protocol and introduce new features etc.
Nobody will care of your certificate if you want to be employed to a company because the employer believes on what you gat in you as bitcoin is not theory but practical especially the programmers and dev.
This certificate is not intended to turn anyone into a Bitcoin developer, but to certify that the holder has an understanding of how Bitcoin works. Just like you can be licenced to drive a car without understanding the technicalities of the combustion engine etc.