When BTC enters the mainstream there will be some regulation attached to it.
Yes - trade and posession will soon be illegal. They are now already (money laundry, alternative currency), but no judge has officially ruled about it.
Owning bitcoins is not the same thing as money laundering.
Also there are no laws against 'alternative currency', as you are trying to claim.
Regardless of whether there was or not, a lot of the people who own bitcoins arent even in the US. Stop acting like America rules the world, it makes the few of us normal Americans look bad.