In blockchain technology, everyone has benefits.. When a businessman wants to promote his product, he will gonna use blockchain technology. It means when you are a member of blockchain you will promote the product in return of coins. The businessman will pay less compare to advertisement.
In advertising in facebook or twitter or youtube or even television, the businessman will pay a lot of money for him to advertise well, and only the company he who had contract of advertisement will be the only one who will benefit. So my answer is yes, we need blockchain technology.