It appears to be covered under antitrust laws and so is only applicable when the creation of a monopoly is likely, but there are situations in which it is illeg

It appears to be covered under antitrust laws and so is only applicable when the creation of a monopoly is likely, but there are situations in which it is illegal. See [1]. I disagree with your claim that there would be no one for VCs to invest in if the law were enforced more broadly/frequently. The important part is that the law isn't applicable to all unprofitable businesses. Only those that are unprofitable because they are pricing below cost. [1]: https://www.ftc.gov/tips-advice/competition-guidance/guide-antitrust-laws/single-firm-conduct/predatory-or-below-cost https://www.ftc.gov/tips-advice/competition-guidance/guide-a...