What is the net worth for a 30 year old Singaporean?

Based on your answer, your question should be how should an individual's net worth be defined? Others will come and share about the factors that will be taken into consideration.

What you are asking now is the same as eg how much should i earn at 30? Is there a guideline for that? If i earn more than the amount am i successful or does earning lesser makes me less valued than another person? I hope your question was phrased wrongly rather than trying to make others feel insecure. :)

It depends on a lot of factors not limited to family background, educational background, and gender.

Rather than comparing with others, it would be good to keep track of your net worth on a monthly/yearly basis and ensure there are consistent increments.