Why would you spread this nonsense?
The proposition is absurd. Nobody would use such a virus as an economic (or any other kind of) weapon, given the potential for it to spread world-wide. And you're right that if a group or nation did so intentionally, then the consequences would be severe. That's all the more reason why it's so ridiculous.
If you look at the most rational explanation, this virus is basically a variant of the SARS virus. It's not at all surprising that there would be such viruses in the wild. If China would clean up its meat markets and ban trade in meat of wild animals, then this outbreak likely wouldn't have happened.
Please don't use these forums to spread conspiracy theories. It does nobody any good.