Definitely the major source of money comes from my daily job and it is not a lot of money but I really glad that early understood that investments it is absolutely important. When I was talking with my friends or colleagues I realize that a small amount of them invest money in assets. Especially they don't think about financial independence and often buy unnecessary things.
Obviously it is a waste when we only spend money on something or goods that are not needed, but when we can think for the long term or for the future then indeed, investment is the main thing to spend your money. So in this case I don't think money from anywhere will be a problem as long as you get the money in a good way to invest, because the thing to worry about is when someone invests from dirty money.
We have different lifestyle, we have to respect others by not getting on to their business by judging where they spend their money, we have to know the other part of the story before jumping to conclusions. It is lucky for you to know the importance of being an adult who knows investing and other stuffs that will gives us benefits while we are growing old. I've know some people who are spending their money on everything they want, and guess what, they are just living their life to the fullest because they only have limited amount of time to live.