[xiphias2]

I see, but what I know is that it's allowed to use multiple banks for the purpose of increasing the amount of money under FDIC insurance (which is more like $100k/bank, not $10k/bank).

There are services that split your money between multiple banks just for this reason.

[sokoloff]

FDIC deposit insurance coverage limit is $250,000 per depositor, per FDIC-insured bank, per ownership category.

https://www.fdic.gov/deposit/covered/categories.html

[xiphias2]

In the U.S. yes, I'm from the EU though where there's a similar insurance (EDIS) which has a 100k EUR limit.