Hacker News Reader

Yes. For example-

The Wall Street Journal "Cantor Fitzgerald helps manage $39 billion Treasury portfolio that makes up lion’s share of stablecoin’s reserves"

https://archive.md/HL307 (https://www.wsj.com/articles/wall-street-firm-oversees-billi...)

(I am NOT endorsing that company, Tether / Bitfinex, or suggesting that anybody invests in it in any way. Just agreeing that if you have a lot of money, then you might profit from it)

You can, now that most (all?) interest rates are significantly above zero again.

This would have been significantly harder e.g. in the Eurozone before 2020.

a $1B high-yield (3.5%) savings account yields $35,000,000. Sounds like plenty to operate what is essentially a shell company plus app for managing monopoly money :)