Personally I’d rather monopoly keep its meaning (a commodity or market sector controlled by a single party) and people use other words to describe the other way

Personally I’d rather monopoly keep its meaning (a commodity or market sector controlled by a single party) and people use other words to describe the other ways a large company can be anti-competitive. But languages do often evolve to take a word specifying thing A that is a subclass of B and start using it to just refer to the entire Subclass B, so wouldn’t be unusual for that to happen.