i've noticed that too. But it seems to change. At time both are correlated, at time, inversely correlated.
He is saying that the two are now inversely correlated.
The chart showed they are highly correlated. It showed their prices always return to agreement. Short-term opposite moves are negated and they move back into sync in their mutual downtrend.
They are certainly correlated and a dip down for gold should bring btc along for the ride. Eventually though btc should break lose and head its own show since golds role is fading more and more. Of course this could take years. There is also the possibility of btc failing and that would also break the correlation. But for now pretty much in sync with each others moves.