[edblarney]

"Think of all the illegal things that happen over bitcoin. T"

Sure, but if the US gov makes bitcoin illegal that means most of the buyers and sellers - regular people - have to withdraw from the market.

Many of bitcoins biggest owners are big name dudes - like the twin brothers from Facebook, the Winklevoss own something like 10% of all bitcoins.

If they perceive a change in law, they'll have to sell their bitcoin before that happens, as will all legit owners ... it will flood the market and might very well crash it.