Right. You only have to declare how much bitcoins you have if you need to pay your taxes from the amount of bitcoins you sold (this depends on the country you live in because not all countries tax bitcoin). In my country our government regulates the bitcoin exchanges here for more than a year now but we there's no statement about taxing bitcoin.  With regulation this can help stop users who plan to use the coins for doing shady,illegal,scammy things like trading drugs guns etc.