Do graduate medicine in the US, it’s tough to enter and quite costly but everything is pretty much guaranteed if you are willing to study hard.

Pretty much guaranteed path to be a medical specialist/surgeon, rather than studying in Singapore.

There’s a huge bottleneck of training spots in Singapore and most of the local medical grads end up as GP.

Surgeons in private practice can earn more than 1 million/year, even specialities like Neurology/Respiratory Medicine can net you least 500K/year in private practice.

Best of which, it’s recession proof and you can keep earning money reliably, as long your skills and age allow.