Is it bad having around 30k net worth at the age of 31 yo? How can I reach 100k by the age of 35 yo?

It's bad only if the continued performance leads to insufficient retirement funds at your retirement age.

You can reach $100,000 in 5 years if:

1. You optimise your expenses (extract the most value out of your money by comparing products and spending on the necessities)

2. You plan to save

3. You are disciplined when it comes to saving

4. Your (salary - expenses) allows you to save $70,000 in 5 years (slightly less than $70,000 is fine as you should be earning interests from it).