Best article I’ve come across so far on the subject:
http://brokenlibrarian.org/bitcoin/
Summary is:
9) Wait, does that mean that every advantage that people claim Bitcoin has is not actually true?
Yes. It’s not anonymous, it’s not free, it’s not instant, and it’s not convenient. It’s extremely difficult to make money on it, mining is useless, and it’s literally impossible that it will ever go into widespread use. Unless you have an ideological stake in the concept of Bitcoin (or want to buy drugs and/or child porn), there is literally no reason to get involved in it.
There’s actually one thing that Bitcoin supporters claim about Bitcoin which is true: it has no chargebacks. Bitcoin transactions are irreversible. Whether this is actually an advantage or not probably depends on whether you’ve ever been ripped off before. If you haven’t, then getting involved in Bitcoin is probably a good way to fix that.