The amount of money flowing and the sheer scale of all of this stuff is without precedent. We are seeing governments from the local to federal level literally shift their economies because of all the speculation. We are clearly experiencing a moment of sorts, and anybody who is worried about what the fallout will be is just handwaved away as ignorant fear mongers. Unless you are the head of these companies doing it in a disingenuous way to pump up your valuation, then suddenly it’s legitimate - but not so legitimate that we should do anything besides let the US government build a moat for them!