"Develop the mind to keep on learning to discover more than what it is already there."
Part time business is mostly selling. This could be your own products (if you have) or selling other people's product. This can be a tangible product, a digital or combination of the two. Their are many internet business that went out to the market because of its wide opportunity. All you need to do is research to see if the company is not a bluff. Call and connect to the personnel to review the business you are going into. Being the root of the business is the best thing to pursue but it requires a lot of wholesale. The required capital must be bigger than that of the regular income earner that cannot purchase. That were the advantage goes in wherein the wholesaler can retail in small portions and get more profit in the long run supplying for the masses.
"Money is a universal exchanging tool."
The barter system still exist but the main tool today is money which symbolizes as a universal exchanging tool.
A rich person knows how the economy works. The businesses are the main bank of income and it circulates like blood in our body which likely keeps the economy moving.
Having a part time business is discovering more through an open mind. It is more likely profitable than relying only in wage or salary. It is a learning curve and a preview of a start up entrepreneurship. Helping the rich get more richer is the true situation of building wealth and of course selling is the most prominent factor of business