According to this [1] Alphabet had 100bn in cash on 2019 so it seems something possible.
Is it just a regulatory matter? Why would regulators care on who owns a bank?
[1] https://www.cnn.com/2019/02/04/investing/google-alphabet-cash-dividend/index.html
If I had to guess, probably the other way around. Banks have obscene amounts of regulations, audits, compliance that would seem archaic and insane to most tech companies. This is already baked into banks operating expenses and procedures. Tech companies would have to take on massive amounts of cost and this would affect their reported earnings. Then there is the aspect of operational speed, agility, speed of R&D. Banks move incredibly slow because of the compliance burdens, at least that was my experience.
- Big Tech companies can't get into traditional banking business because of the regulation - Banks are loosing part of their business as they can't compete with other companies in terms of technology
I see the future of banking something like traditional banks being the back office of some other more tech leveraged companies delivering services.
Also, with these huge amounts of cash available from this giant corporations it seems possible they could find some other way to be part of the game and accomplish with regulations, as long as they assume the risk.
what a bank does. which is lending out other people's money. most governments want to be quite sure who its lent out to.