There are 8 companies (all American) that have a market capitalization of over $1 trillion - Meta/Facebook, Amazon, Alphabet/Google, Nvidia, Apple, Tesla, and Broadcom.
The US financial sector allows for substantial financing of risky and high potential projects with innovative equity structures that allows for fabulous innovation and US near monopolization of various kinds of cloud computing (AWS/Azure), networking switching semiconductors (Broadcom), among other high-technology inputs necessary for daily life.
It also leads to absolute US dominance of global cap tables - with many investable opportunities from the premier global firms - from the most conservative utility & real estate firms such as Income Realty, Consolidated Edison, and NextEra Energy (Florida Power & Light) that have provided steady dividends and consistent service for decades on-end; to transformative industrial firms such as CF Industries, Emerson Electric, Celanese, and Agilent Technologies that have reshaped industry over and over again; to firms supporting the above like JPMorgan Chase & Co. to Brown & Brown that continuously redefine management; to firms like Procter & Gamble and Walt Disney Co. that captive again and again a profound consumer experience, to highly risky firms that lead technological revolutions such as Microsoft, Broadcom, and Nvidia - US capital markets contain multiples for every kind of investor of every risk category to fund all sorts of transformative capital projects