If his analysis and commentary aren't just based purely in ignorance and he does in fact have an agenda, I'd be willing to be that reason (d) you've given is the most likely. He's merely a puppet whose strings are being pulled by larger and dark entities that manipulate everything from stocks to currencies to commodities.

And their agenda is either the complete annihilation of cryptos or manipulation of their price so they can get in at their desired entry point. Goldman Sachs is a screaming indicator of this scenario with their recent prediction about BTC and I'd wager they're short BTC right now and waiting to reverse their position until they've created a lower price and scared smaller investors into selling at a loss.

Pure evil man. John Oliver is just a pawn in a much larger grand scheme being orchestrated by the usual suspects in my opinion.