Years ago, I remember people flooding the chat with this in Runescape. I thought it was a weird slang of English.
This specific sentence, or Dutch in general?
This specific sentence.
Can it mean both bank for sitting and bank like where you give your money?
Yes, correct.
Bank means both bench/couch and bank (for money)
It seems odd to see zijn, not staan, used here.
you could use staat, however it's better to use is here.
Bank also means couch though doesn't it? Context is important again.
It means both, and both are accepted