$20B in what? Annual revenue (i.e., mostly fees added to transactions) of the companies that run the markets? Assets under management? Amount deposited by traders at a particular moment in time? Valuation of the companies that run the markets?
Valuation of the top companies (based on a random Gemini summary when I searched for it, after a vague sense that things have gotten quite big).
$20B in what? Annual revenue (i.e., mostly fees added to transactions) of the companies that run the markets? Assets under management? Amount deposited by traders at a particular moment in time? Valuation of the companies that run the markets?
Valuation of the top companies (based on a random Gemini summary when I searched for it, after a vague sense that things have gotten quite big).