or it would only be worth 0.000001. Now lets think for a second
And think of how many Non-drug reasons to buy bitcoin we can
and tell our friends!
drive the price up to $1 MILLION

Incorrect that there would be no bitcoin, there was bitcoin before drug trade sites. It is correct that taking away one of the markets would lower the value of the currency, so what? Any currency including the dollar would experience the same thing.