You definitely should give it up doing it full time. I'm in same boat as you. 7 out of last 9 projects have been failures. I quit my job only for the first star

You definitely should give it up doing it full time. I'm in same boat as you. 7 out of last 9 projects have been failures. I quit my job only for the first startup. After assessing the opportunity costs from quitting the job, I have come to the conclusion that getting your idea implemented with others with you paying the money is much simpler than taking the full hit to the salary. Also, please never do these solo. My 8th attempt has been partially successful (still running with growing business) purely because I partnered with non tech founders. The way they took this small idea and pivoted on it and thought business cases for it was amazing. More importantly they aren't afraid to just go talk to large customers and getting rejected. My current startup I'm doing with another non tech founder and the confidence he has about the use cases and business reception is amazing. Good luck!