You want to change jobs because you want to change job, or because you want to earn more?

If it's solely for the money, not worth it because of the uncertainty. Like others said, the property market is not as pretty as it looks. What you see on social media is only the manicured, "good part" of it. They don't show you the downsides.

But if you think your govt job sucks and you want to venture into sales for the sake of venturing into sales, for a change of environment, because you want to try something new, and with the non-guaranteed possibility of earning more, then go for it.