Business may seem necessary and harmless, and to some extent it is. However the question is "where is that line?".
For many it's a complicated topic that spaws lots of market research, and psychological studies and ecconomic studies of society. However, thats if you don't find irrefutable logic that shows the truths of business and in the end the implications really are quite sinister.
So business is the practice of finding something that is of some value to some group from society to exchange for money. Either a product or a service, there is also playing the market which is a practice of trying to buy and trade money or goods to get more money. This process creates a competitive market, even with a monopoly that company still has to make or trade or do something of value to some group of people or they will lose business, and thus lose potential to get money, or money itself. like buying a house to resell it for a higher price, if no one needs houses any more or if the public will not pay any higher of a price than what you bought it at, then you would get stuck with the house, and maybe you already have one, or maybe you bought several, maybe you took out a mortgage because you thought it'd sell. so you take a loss, and many times these business risks are such a major loss that you lose everything and theres no way to be absolutely certain before-hand. some people say you win more risky situations than you lose, but thats only if you start early enough so that you make enough extra money on top of it all that you can afford to take a hit for a full house price or 2, or a dozen. For most people they get in too late after the trend has already started. and theres no way to really predict these trends. You can try, but that itself is a risk. If no one else is buying or selling it, if no one else ever did it before, there may be a reason. But with business the bottom line is the bottom dollar.
Already we have described playing the market, that itself is evil. it's akin to price gouging except it does not happen in a monopoly, it happens in a free market where people base their sale price on what others are selling for.. But things can get even more evil, and sometimes even more good. lets talk about the good first.
The good happens when people create new products using existing materials to fill demand in a market or solve life issues, or generally offer something a group wants. However this has time limitations and high Research and Development costs. you also kinda need to be one of the first ones to do it, or have found some way to improve existing products to make your claim to the market.
Then we spawn an evil. Intellectual property with no expiry date or expiry conditions. and that creates patent sitting. it's new techcnology or new improvements which could drastically improve human life or our planet's health, and it also happens to be bad for business because it somehow decreases profit of som major company or industry, so they buy the rights to it and sit on it and never use it and sue anyone who dares. In this way major progress is inhibited and people can even die when the solution to save them exists. Then naturally they try to tell you that unprofitable things are not actually possible to make or create to attempt to stop you from improving on that and becoming competition.
But the end result is, actually society has a finite amount of things that can actually be solved and a finite amount of needs that can actually be met, and a finite amount of anything that can be sold or traded or done and actually benefit people and thus create marketable value.. This means there is always an inevitable market cap. there is also a limit to the amount of progress that can ever be needed. you only need a computer so fast, you only need an apple so big, healthy and tasty and red, after this point any increase becomes redundant or a novelty, sales decrease from expectations or disappear or come to a grinding halt. Businesses know this and so they try to trickle down advances over many years selling each for maximum profit. they may even set expiry dates and "discontinue support" for things that are too good to compete with. they might make intentioinally inferior products to suceed them so they can have some sort of feature to add in that they know you want. You know starve someone for a week and even the worst food tastes good. but eventually people catch on and find loopholes and methods to continue using old products or replace services. Well unless it's a food product, but theres only so much demand for food, and most business people are not happy with the prospects of the small returns and interest off selling food and the amount of work involved in careful and sanitary production of it.
So in the end, businesses know that actually theres only so much they can offer to sell before the economy does not need anything else or newer versions or improvements. and in modern society, they have already hit this point. So yet another evil and a very sinister one at that is employed to solve this "dilema" businesses decide that either a completee technological reset is reequired and people need to be stripped of all technology and imprisoned for teaching about how it works so they can slowly reintroduce it again over the next few thousand years. Or, society needs to change to include more desires which can be profitted from.
And that is the biggest evil of them all, changing society from normal acceptable civil society into a perverse and morose sensless warzone so you can cater to the increasing perversions and sensless greed and desire that comes from it. So naturally they create new social conditions by using their money to buy political favors and infiltrate the courts and lower government and generally fund and control the intelligence agencies and media and health organizations. And if that still does not create more value then it's time to nuke it back to the stone ages. or release a virus to thanos half the world's population or more. To them, they call it "progress" and they criticize anyone for standing in the way of their progress.
why do they need more money? if there is a market cap, why do they think they need more?
Because they want to get so much money that their kids and grand kids and grandkids' kids and their kids kids kids kids kidskids (infinite) as far as they can go will never have to work a day in their lives. that and beccause what price can you put on a human life? science is not perfect, but they believe it just costs alot of money to get doctors to really keep you alive so they try to amass enough money to cover any possible medical conditions for them and their kids kids kids kids etc. plus inflation plus maintenance etc.. it's a never ending vain game of greed that results in the business owners trying to first get all the money away from non-business owners, then attempt to fight amongst eachother to figure out who will win, who will own everything and become the global king or queen.