SpaceX has reached a market capitalization of $3 trillion in after-hours trading, surpassing the valuations of Microsoft ($MSFT) at $2.97 trillion and Amazon ($AMZN) at $2.65 trillion. Despite this valuation, SpaceX reports significantly lower financial performance with $19 billion in sales and a $9 billion net loss, compared to Microsoft's $125 billion and Amazon's $91 billion in net income. The post expresses skepticism regarding this valuation gap between the private space company and the established tech giants.