The style of argument is akin to Reductio ad Absurdum, taking an absurd position to it's logical conclusion. The "absurd position" here is a company wanting to sell heroin on the open market, and she takes that to the logical conclusion.
She could have said "meth", "nuclear weapons", or "dead infants", or whatever instead of heroin to make her point. If you read that as a comparison to Coinbase being a heroin dealer than you're the one editorializing her effort.
Here's another reductio ad absurdum argument:
Let's assume the earth is flat. Either the surface of the earth must go to infinity or people must be walking off the edge of it somewhere.