I just got an offer from a startup. It is a very cool project I'd love to work on. It pays well, and investors are literally hurling money after it. I truly believe in the project. It has great potential, and the money could be insane. I trust the people worki.ng, and they are legends in my (small) country's startup-world
Thing is - I have a job already, which has great pay, and tons of benefits that you can't really put a price on (friends, support from above, security). I like the work, but it's not amazing.
I do want to move over to the startup, but I fear losing my job security. I got my current job from sheer luck (my grades are shit, no idea why they selected me)

What do I do? How can I make this choice?