Seems like a strange exercise, since it doesn't actually touch on the bubble part. A bubble is when valuations are higher than the actual value, which usually means the performance after an exit. Presumably we would have to wait some time after that happens to see whether that is true. If they perform well we weren't in a bubble and if they don't valuations are likely to fall as people lose confidence.

Yes.

(1) is pretty close to being true. Will be true with Uber's $120B valuation

(2) is already true according to the list. Stripe and Instacart alone are already worth > $27B in aggregate

(3) might actually be already true, or at least close to it. Gitlab is worth $1.1B, and there are a few other YC W15 companies that are already worth hundreds of millions and are on track to become unicorns: EquipmentShare, AtomWise, RazorPay, Qventus, GrubMarket, among others.

I read yesterday that Uber will be valued at $120bn during its IPO. That will mean (1) will be met pretty easily.