It's definitely worth of being a currency, but is it ready? No. There's still a lot that needs to change. When it will be ready, it will just be another $ without physical form. People overestimate bitcoin as a currency. It will do great things until it reaches the "normal money" status, but when it will happen, there won't be any difference from todays money.
Yes that's true, assuming it can settle down and stabilize itself. This is a very good thread because it brings up some intelligent issues behind the coin being accepted as a currency that most don't acknowledge.
At this point in time, there's no way it can meet any of those three criteria. But can it in the future? Who knows, maybe if centrally regulated. But then that would kind of defeat the purpose, wouldn't it? Now the biggest problem bitcoin faces in terms of regulation is stabilization and standardization of prices. If one exchange is quoting prices 2% higher than another, that could be a difference equal to thousands of dollars