Also, CME Group, owner of the Chicago Mercantile Exchange, is close to overtaking Binance as the largest crypto derivatives exchange in the world. (CME's product is a cash-settled futures contract, essentially a side bet on bitcoin's price; no BTC changes hands). In other words, a business with roots in the 19th century and agricultural commodities like corn and pork bellies, and one of the key spots in all of traditional finance, is a major player in crypto trading.
That said, this is less about how much of the total BTC stash that Wall Street holds. Finance people are increasingly taking over the story – at least to the mainstream – around bitcoin, to an extent that is noteworthy.
What does TradFi muscling its way to the front of the pack mean for crypto?
First, an asterisk: Bitcoin ETFs and crypto derivatives trading (much of it involving BTC) don't mean finance bros are swallowing all of crypto. Bitcoin is not all of crypto – though its market capitalization as a percentage of the whole crypto market is at an unusually high level above 50%.
There are the myriad blockchains like Ethereum and its associated layer-2 networks such as Polygon that run smart contracts – software designed to power various financial and other applications – and that have their own tradable tokens.