No matter where your line of job falls in, investment are key in life. I have known people who didn’t even have businesses and worked a 9-5 but were still interested in investing. You don’t need to be extremely wealthy to look for an investment. If you are however very wealthy, you are put in a more advantageous position as you will have a wider array of choices for your investments since most likely money is and will never be a problem. If you want to make your money grow, pick out a good investment.
In our eyes, investment is indeed one of the important things in our lives. But we know that everyone's circumstances are different, whether it's their financial situation, needs or economy and others. Not everyone can invest, besides requiring capital funds, good knowledge capital is also needed, people who work hard may spend their time working and the rest to support their families until they have no thoughts at all to invest.
I agree with what you said about this investment being the key to life. Maybe only people who have stable finances can invest, besides that there are people who are reluctant to do risky things like this investment. My advice when finances are stable, it would be better to invest as long as the roots are clear.