There is a reason El Chapo had 2 Billion in cash stashed away in his mansions. Cash is still king.

Converting millions/billions into cash from bitcoin is WAY too easy to see. And the time it takes to get the billions out would give you a big problems with liquidity and volatility of assets.

I barter for my drugs.

All joking aside, though, I've actually never met a "drug dealer" that accepted anything but cash.