Usually I would agree about quitting the job and just going for it. Like you said, time is finite. But, one does have to consider the details of one's situation

Usually I would agree about quitting the job and just going for it. Like you said, time is finite. But, one does have to consider the details of one's situation. what exactly is the day job buying you? In the OP's case, US citizenship, which means a lifetime of opportunity to build businesses in a free country which he/she likes living in. Two years of steady income, while still working on your business on the side, sounds like a good bargain. Of course, your situation must be different, so you would have to decide accordingly.