there is no decent way to earn money with bitcoins only right now though i hope it will be possible in the future
Signature campaign is really good for earn stable money with bitcoin every week. But, you also need a work to earn that. There are many ways to earn money with bitcoin, but signcamp is the best for me.
Don't make signature campaign as your primary income , but if you can maintain your posts you can get good amount from sig camp .
The funds you got from signature campaign , you can used for trading an altcoin.