I meant libor as in a futures price that was disconnected from anything meaningful not a direct comparison. The comparison was to how libor was easily rigged by those submitting quotes that weren't correct. Libor wasn't just a vote but a collection of informal (and incorrect) quotes.
When financially settled against a manipulated number the standard ways a future affects the spot (by taking delivery) doesn't apply.
Go read the proposed contacts for the future and real time BTC index. If the index is being manipulated the future doesn't stand a chance at correcting it.
This reminds me of potential VIX options manipulation. Not quite the same thing, and probably not as susceptible to manipulation, but a similar concept nonetheless: https://www.bloomberg.com/view/articles/2017-05-24/vix-tradi...
My experience is equity options, btw.