Geminis miss out if they don't do this every day...
As an Air Sign, you prize intellect and consider it the key to all things. And as a Gemini, you are ruled by Mercury, planet of learning and teaching.
You have a serious knack for picking up new skills, this comes in handy in your work and money lives. You should take an online class in something like marketing, and apply it to your business or learn a new language to speak with foreign clients.
Whatever the case, using your cash for learning not only makes you happy and fulfilled. You also gain new skills to apply to your life in meaningful ways. Move toward whatever interests you now. How it fits into your life will make sense soon enough.