Why people invest in the financial markets?
The reason is only one.
To have more money.

In fact, investing is neither more nor less like a job, using our money to have an economic return.
Not to be confused with the term speculation, which refers to a short term view, investment refers to the long term and has a different forms of investment instruments.
These tools are created to ensure that companies raise money for their activities, money that is raised by selling debt such as bonds or a small part of the company, such as shares.
Returns are never guaranteed given the risk inherent in investing.
There are no zero risk investments, don’t believe anyone who tells you such a thing.
In fact, you can lose everything, because you have to remember that the higher the risk, the greater the return.
Various techniques are used to lower risk, such as diversification which applies to unrelated investments.
Investing serves to achieve personal and family financial goals such as the possibility of having more money for goods and services, to be able to afford a dream home or vacation, or to have economic certainty when you retire.
Starting early means having a longer period of time to be able to accumulate, also thanks to compound interest.