Buying out competitors isn’t a sustainable long term business strategy. Think about it, if one company was trying really hard to be a monopoly and simply bought out all their competitors, then anyone could make a shit ton of money by just continuously opening new competing businesses and selling out.

Secondly, if the strategy is to price out competitors, then… What’s the problem? If the so called “monopoly” has to keep prices literally so low that no one else can compete, then they aren’t doing any real harm. If they do eventually decide to jack up their prices, then that opens the door for a new business to open.