There must be some form of investment for there to be wealth, such investment can be in the form of money, time, energy or anything of value. Although people think that investment is only money but it goes beyond money. You can invest your time in something that will earn you wealth, you can even invest your reputation and it will earn you wealth. Therefore, for there to be wealth, there must be investment because wealth does not come by accident or by mistake.
Anything you put efforts in to generate wealth is your own investment it doesn't necessarily mean that you should invest money to make more money in the future but getting ideas that could generate money to you is the highest form of investment and it could make you become wealthy if you use your ideas to create things that would attract people to come to you and if you can solve their problems with your ideas you will also become wealthy.