Do you put all your money in one bank?

[Jason]

A single saving account or current account can hold all the money someone have earned. Do you save allow of your money earned in one bank account or do you split them across multiple accounts?

If one account can save an unlimited amount of money, why do some people operate multiple bank accounts?

Some people might share one with their spouse.  In that case, they would want another for personal reasons.  Anyway, they may not trust their spouse too much and I can't blame them, lol.