The $50bn is what you get when you multiply the number of coins times the price of one coin. This is a kind of fun number to think about but there are a lot of ways it doesn’t match up with reality.

Like, if I make a company with ten billion shares, and then put shares for sale at $5 a piece, and you buy one, then my company would also have a $50bn valuation, by the same logic that Terra / Luna had a $50bn valuation.