Let me clarify that monopoly means there is only one firm that dictates the price and supply levels of goods and services, and that firm has total market control. Here, firms are the price-makers because they control the prices of goods and services. And in a competitive market, prices are dictated by supply and demand.Here, I don't believe Binance will control the crypto price, but they will benefit from the transaction charges, of course. And moreover, if the market has more than one firm that has real potential, then only all of them will survive in this competitive market. But when it loses trust, then definitely people are not thinking about the market monopoly but the money they put in, even if it leads to a monopoly.
I believe that binance, being the number one exchange, has nothing to do with monopoly, because there are other exchanges that exists and are doing well too, like remitano. Binance is at the top because of their excellent services and integrity, nothing more, and therefore customers are more interested in getting delightful services from them than worrying about if the exchange is manipulating other exchanges to go down or delisting some crypto coins. When you have confidence in a company, you'll want to believe that every measures that it takes will be to the advantage of their customers. Investors care more about where their money will be secured than how the exchange treats their competitors. It's a normal thing in business, the big player wants to crush the ones under to remain at the top.