Now, for free to work, you need to make sure your infrastructure is cheap. You'd be amazed how many users you can cram on to a $2500 AMD server with 8 cores and 32GiB ram that costs you $200/month to co-locate. (depending on your financial situation... if those numbers aren't trivially small to you, you may want to start with a $20/month VPS and scale up as you need. I'm just pointing out you can save a whole lot of money once you start needing capacity by outsourcing less.)
This will give the site a chance to grow, if users like it. If it does grow, well, that's exciting, right?
See, meanwhile, I'd get a job. It's nice to have a job. It's a different pace, you get health insurance and a bunch of cash, and you don't have to work so hard. A job isn't forever. My experience has been that if I'm feeling frustrated and hopeless with my company, a year at a regular job cures me.
If people start getting interested in the site and it excites you, you can quit and go back to doing it. If people start getting interested in the site and you still want to keep your job, well, customers will attract new investors and possible partners. Stock brokers are usually good marketers, so I think you may have potential marketing people in your customer base.