At the other end of the spectrum is pure monopoly, the market structure in which a single firm accounts for all industry sales of a particular good or service. The firm is the industry. This market structure is characterized by barriers to entry—factors that prevent new firms from competing equally with the existing firm.
In my country, there are many monopolies in different industries. For example, Samsung dominates semiconductors and electronics, while KakaoTalk leads in messaging, taxi services, and even its own payment system. Due to the preemption of few head coorporations, they are in charge of control of the market prices, which makes me question about how small businesses compete and survive.