It all depends on the standard of the life that you want.
If your standard of luxury only requires RM10k/mth to sustain, then passive income of RM20k/mth is good enough, since it is 100% extra of what you required.

However, luxury is very subjective and varies with different individuals. Once you reach RM10k/mth passive, your exposure will be different. You will be surrounded with people that will expose you to a different level of luxury. So, honestly, you need to first determine what kind of lifestyle you would want, and work backwards.