Re: If you want to get rich, you have to become immune to the money.......!
I think its quite true because based on that statement we need to doing our best to create value, without getting distracted by others' success or future gains. This way, we stay focused on meaningful work and avoid wasting time on distractions.As a result, we build something truly valuable that earns its own rewards over time. So the point is consistency . 
Consistency in working for ourselves is something that is absolutely necessary for everyone to do, because we all live in our own way even though it is through work that we understand very well. Because everyone must care more about the results of their own work than the results obtained by other people, so the level of consistency must not be reduced in the work that we have started and can continue to do so for a very long time. So the main focus remains on work that produces results so that passion for work can continue to increase over time. However, sometimes there are several other things that we need or need to do to increase our income, namely innovating in other things because if we expect money from only one source, it will not make us progress even though we are consistent in doing it.
Consistency remains the main key and everything comes back to what we do.