I don't think monopolies are inherently a bad thing, we usually centralise resources around a winner who most effectively turns capital into goods and services we want and drives the most deflation and in turn provides the most value, as long as they do that, they retain their position

If they fail at their job competition constantly at their heels waiting for the monopoly to slip up and they either have to improve or buy them out, it's not easy to manage things at a certain scale, so you always opening yourself up for an attack in one or other verticle of your business