For some reason I get the visual of a circle of men in suits and ties agressively converging on Bitstamp with suitcases full of cash, forming a spartan shield formation and executing a suprise attack.
Similar but for me it is a bunch of men in suits with Harvey Specter coming into a downtown Manhattan Office saying here is the deal you give us what we agreed on or we will show the jury all your dirty laundry Keeples XD.
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But in reality its probally a bunch of CEO's Companies and big investment firms all agreeing to get in big on Bitcoin and pouring a large amount of their venture capital share holdings and trusts into the sphere in companies retail banking or firms.
Or even just buying Bitcoin themselves and holding it.
but what would this look like in practice? are we sure it isn't already happening? the impression i get from many people is that they think, "wall street enters, then bitcoin to 1 trillion"
In practice it would probably be the business legal and computer departments all developing separate interests in Bitcoin and agreeing that this is a good idea we should implement it in our stores and ecosystem.
As more firms do this and provide capital towards these businesses and industries in significant amount wall street would enter and start the financialization of Bitcoin and its commodities.