Do you think or do you think he deserves? Since the first question doesn't really make sense here; that would be a question to law school students, not bitcoin enthusiasts. How would we know without a good knowledge of law?
So I'm going to answer the second;
Honestly I think 20 years is enough for this type of a crime. However, to discourage future criminals, I think a higher sentence is okay too.
He shouldn't spend a second in jail... The law is so criminal when looking at the constitution... it is sickening.
I don't care about american laws or the american constitution. All I know is he enabled networks of drug and perhaps other harmful substances for trade around the world, that possibly harmed many families in the process. He definitely deserves to be punished.
Just because there are people or governments that have committed worse crimes than he has is not a reason to let him go unpunished. Two wrongs don't make a right, as they say.