There is only one reason for a normal person to want a Bitcoin - to break rules, laws, and regulations. This is the future of Bitcoin, this is what will drive the price up, and I think this is what we should all be focusing on.
I've been using Bitcoin as a currency since the autumn of 2010. So far I haven't done anything illegal. I report my coins and my earnings to th tax authorities, who have no idea what it is. So far it is untaxed, but I have done everything right. Nothing I have bought or sold has been illegal. I use Bitcoin because it is usually simpler and faster and cheaper and more secure than all other ways of international money transfer. That is a lot of pros and no cons.
In my opinion the future is legal. I sell coins every day to people who use the coins to pay for services or as a store of value / investment. Nothing of this is illegal. And the value will of course drop to the bottom if Bitcoin is deemed illegal. Both I and most other people will get rid of all we have as soon as possible, and it is going to be hard to do it in a legal way.