Is there a way to turn it into a part time business that you can run along side a new venture? 50-70k sounds like it could be helpful in supporting you during a new venture.

Figure out what you want to do, slow down your involvement with your current venture as you scale up what you are passionate about doing.

I think most people here would recommend that you do not shut down your current revenue stream until you have at least offset it with a new revenue. View your current situation as an vehicle to help you do some awesome things in your next venture.