Maybe just in BTC or for a certain article, who knows but the interesting thing is, that there have been seized 3 times more Monero then BTC --> if that is true 
It would only be interesting if 1 BTC = 1 XMR in terms of price. As Febo explained, these figures show that BTC transacted 70x more volume than XMR. Prices on the darknet are still set in fiat..