He's totally overlooked one aspect of bitcoin, it doesn't matter if it's deflationary if all I'm using it for is selling drugs and converting bitcoins into cash

He's totally overlooked one aspect of bitcoin, it doesn't matter if it's deflationary if all I'm using it for is selling drugs and converting bitcoins into cash straight away or using it as an intermediary step in sending large amounts currency around the world anonymously. Who cares if it doesn't work great as a currency (if you believe deflation is a bad thing), it still has a lot of utility.