Well the purpose of life is definitely not about money and power. People throughout history have attained that and been like 'Now what?'
In Eastern Religions, there's the concept of 'enlightenment', that's the thing monks attain after decades of meditation. It's the highest state a human can attain, where you are always happy and loving, and no matter what negative thing happens, nothing can change that. Every human suffers, dies and is reincarnated for an infinite number of lives until they achieve enlightenment, and forever end the cycle of suffering.
I agree with all of that, but if the true goal for everyone is enlightenment, then everyone should just be monks and meditate all day. Meditation is the most efficient way to gain enlightenment, why bother with anything else?
Fortunately, there's also the concept of the 'Bodhisattva'. That refers to people who delay reaching enlightenment to help others get closer to it. Instead of passing through the gates of heaven, they turn back and help others find the gates. In other words, it's not just about you getting enlightenment, but helping as many people as possible achieve enlightenment.
That makes more sense. For most it's not appealing to meditate all day because people have differing interests. So to be a Bodhisattva, you can be great in whatever you're best in: business, politics, arts, sports, whatever. Because different things inspires different people to reach a Buddha state.
So whatever you choose to do, I think your purpose in life should have 2 things
1. You should reach your fullest potential. Some people are geniuses that can do a bit of investing, have a bunch of generic but successful small businesses and become millionaires and provide a substantial contribution to society. But if that's easy for them, and the genius is only using 60% of his effort, what a waste. To reach your full potential you should test your limits, reach heights you didn't think was possible, it should be difficult, you should struggle and suffer.
Because 2. If you reach your full potential, you would be helping the most number of people possible. If that genius could benefit thousands of people, but only helped hundreds, because he only used 60% of his effort because he didn't want to struggle and just wanted a comfortable life, he's a failure. Call it Communist, but if you have an infinite amount of lifesaving magic potion, but instead of saving millions of people you only save a few, that's only slightly less bad than killing millions of people.
Most people compromise on their dreams because of social and family expectations, or a desire for money and stability. There may be a great artist in you, but oh I tried for a few months and it feels difficult and I might not make money from my art until many years later. So you compromise and become an art professor. Stable income, easy, comfortable. Unfortunately that's not your fullest potential, it's not what God wants you to do.
I'm not saying being a professor or doing 'low-skilled' jobs makes you worse than innovators and geniuses. Be a great cleaner or dishwasher, if that unlocks your potential and is what you're chosen by God to do. Geniuses are overrated anyways. Can you cook and clean? Well I can't.
The point is if you decide your path based on fear, and not on what you're meant to do, that's a disservice to yourself and everyone.