If you discount your stock options to be worth 0 (which is the most likely scenario) and it still makes sense to work at the Startup then go for it but save agg

If you discount your stock options to be worth 0 (which is the most likely scenario) and it still makes sense to work at the Startup then go for it but save aggressively because while they may tell you there won't be layoffs and they are in a strong financial position when layoffs do come they are almost always last in first out.