I still don’t see what the upside is to their valuation? It’s all baked in AFAICT.
10-15 years ago, it was much more difficult for companies to raise this much before going public, which forced companies to go public much earlier, before all upside was realized by private investors.
The result is private equity and VC funds benefit from the early gains, and by the time the company becomes public (and is accessible to retail investors) there's typically not much of a lucrative near-term upside opportunity.
The same thing will happen with Stripe once they finally IPO. They'll debut at an insane valuation, and there won't be much upside opportunity for retail investors to benefit from. Because if there were, they would be able to more easily raise the capital from private investors rather than the public market.