Outlawing bitcoin trading would send the price to the moon. No sense arguing that point, name a thing that costs less on the black market than it costs in a free market. One thing...
All kinds of things... Guns for example.
nope, huge markup for black market guns. Hard for me to nail down here but ask any soldier whose country was under UN arms embargo during or prior to conflict (Croats and Kosovars maybe easier to find than Syrians or Iraqis but...well probably some of any of them around here). Same holds true anywhere they are banned.