Entrepreneur or employee, most people make game-changing wealth through time and investments, not paychecks.
Your start-up might have been the investment vehicle of choice, but if you're serious about financial independence, burn rate and investment strategies are your much more relevant friends. Get yourself a $50k job and learn to live like you earn $40k, putting the rest into your investment portfolio. Move up to a $100k job and learn to live like you're on $60k. If you exit every month with all of your dollars accounted for, you're living fast and will fail to reach exit velocity.
Without the 24/7 burden of your business (if it was less than this, you were already going to fail), you can spend time working on smarter places and methods to build your capital generating machine. Compounding interest can mean your $10k saved from that first year could be worth over $20k with just 5% interest over 15 years. Underwhelmed after all your recent crypto gains? If you keep putting $10k in each year, by the time you reach year 15 that pot is worth $237k. If we assume you bump up the amount you put in by 5% each year with your payrises, you're now staring down $318k.
These are modest amounts and rates, you can work them much harder if you're feeling bold. For example, aim for 7% interest and increase your investment injections by 10% every year, and in 15 years you're staring at $500k.
Now if you're thinking entrepreneurially, imagine how much further your next business could go if you have this extra cash to invest into it at the start.