[G]overnments will squash it.
Possible, but I don't think it's very likely, because its decentralization makes squashing it hard. It's not like they can raid some company's offices and disable the network.
Tax evasion, money laundering and counterfeiting are likewise decentralized, but government has been able to drastically reduce the rates of those things.
Tangential, but a subject of some local interest:
Why Bitcoin will fail by Avery Pennarun. "The sky isn't red." Thesis:
I'm not sure I buy these and am not competent to evaluate his claims on 3., but would like others' critique.
L019: Bitcoin P2P Currency: The Most Dangerous Project We've Ever Seen by Jason Calacanis. A rather more enthusiastic viewpoint of the project:
The actual text contains many more caveats than the eye-catching selection of points above.