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Generally speaking, if enough experts and MainStream Media/.govs/investment banks launch these sorts of campaigns, that is a sign to take the other side of the bet... In this case, BTC is likely a buy.
Goldman-Sachs typically makes bad calls to screw their muppet customers in a similar way. Other prominent investment pros are similar (they make bad calls). The lesson here? Think for yourself!
You have to think that the main reason for many of them to attack bitcoin is because they're afraid of it and they don't want it to succeed. If large banks and governments are afraid of bitcoin then that only shows the potential behind it.