Better ask yourself that question rather than asking others. It's your money and you should do anything to it with your due diligence.

If you're looking for an advice, we can always give you some tips, but again, it is in your own judgment whether or not you should follow those. Better save some from that signature campaign because saving--as we know it--helps people a lot, especially in unexpected occasions and emergencies. After all, it's better to be safe than sorry. Also, if you want to help the economy, you can support merchants that implement bitcoins as a payment option and buy things and stuff that you want/need.