Pi means “Passive Income” – Money working for you.
Let me make a small correction. Pi is not “money working for you”; it is “making money work for you.”
The difference is that in the second definition you still have to actively work to make money work for you.
As we move into a more richer world- where there are more Investors, a more complex & rapidly changing world – where old formulae don’t work automatically, there is a realization that Pi is not as passive as it used to be. Now more active involvement & effort is required to earn a better level of Pi.
Preparation is required in greater degree for an Investor. Alternatively, you can choose to be a “Saver” and invest in Tax Free Bonds which might result in true “Passive income”.
However, an “Investor” has to “make money work for him” and hence it is a more active form of Pi.
The most active form of Pi is “Entrepreneurship”, where the risks & rewards are much higher.
Just a recap, Preparation = Training + Courage + Sacrifice (TCS formula).