Earlier quoted context omitted.
Update: I edited my comment to focus on the mindset of making predictions (including recognizing the uncertainty and being comprehensive about possible scenarios) I made a new top-level comment mentioning the 2006 YouTube acquisition only to show that many people were shocked, but -surprise- markets are usually better predictors than individual hunches.
This isn't a market in that sense though - it's very much one sided what Anthropic tells us and they are privately traded. It is very far from a situation where the price discovery mechanism is allowed to work.
1. How much an organization is willing to invest in X competes against other market opportunities.
2. The effective price per share (as part of the latest round of financing) is an implicit negotiation.
It is a matter of degree, sure, but my point still stands: there is a lot of collective information going into this valuation. So an individual should be intellectually humble relative to that. How many people have more information than even an imperfect market-derived quantity?