I disagree, bitcoin can certainly be regulated.  You just watch.

As far as OP goes, when I sell something on Ebay I have immediate access to my money.  So that must vary among countries, and I'm sure if a bank or whatever decided to start using bitcoin as a currency, its use could be regulated just like this.  At least that's how I imagine it--and I'm not an economist or politician, so take my opinion for exactly how much you paid for it.