Job offer being rescinded

I just got a job offer but I’ve been interviewing at other companies. They want me to decide and sign the offer, giving me 3 days to think about it. But I’m scared that if I accept the offer, email all the other companies that I withdraw from the interview, they might rescind it for whatever reason before I start. I keep reading some post about people getting their offer rescinded and having to start over with job applications. And I’m worried it might happen to me. I’ll be starting the job on the 24th, if I do sign the offer, which is a lot of time. Idk what to do and don’t really want to risk anything bc I really want a job right now. How common does these things happen?