So many such profitable companies are the best possible evidence for the need for drastic antitrust intervention. The lack of competition and regulation is leading to a massive drain on every other sector.
This bubble is caused by excess competition. There are 4 large companies who believe that a large new market is being created so each is investing large amounts without any evidence that there will be a single winner that dominates the future market. None of these companies has anything remotely resembling a monopoly except for Amazon in online retail.
