I guess the difference there is that the wealthy can take out loans and secure assets like houses against their stocks but yes the stock market isn’t real
In the US of A, 1T = 1.000.000.000.000
(1B is 1.000M, and so forth)
In the metric system, 1T= 1.000.000.000.000.000.000
(1B = 1.000.000M, and so forth)
That's why in other languages you sometimes hear "a thousand million", although I agree with you in that the most common way of counting on the internet is with imperial billions.