Do people straight up just deposit a million into their bank account once they get their gains?

I’ve always wondered this since I don’t understand it much nor have I been in the position lol

Say someone makes $500,000 off a token, decides to cash out, sends it to coinbase or etc wherever, then sells it on there, do you just then deposit it from there into your bank?

I mean I would assume the bank would be questioning where this came from or if it’s legal etc if you’re someone who just typically makes like 60k a year lol.

How does that work or what does one do?

Especially cause sometimes coins just skyrocket and people wanna take their profits fast