That is not cool. It is crazy how you don't even have control over your own money using fiat and banking systems. Using crypto you have complete control.
Guys I'm not operating as a trader i wasn't buying and selling. I had btc. The price went up and I'm at a point in life where I needed cash. So I sold. That simple.
Anyway they have closed my account and returned money to source. No explanation. No clue to what source. The bank is Monzo sure I've said the name already but if not. Avoid!!
Banks have limits of movements, if you go over those limits you get flagged. Best thing to do is ask them directly before doing it, how much money can be moved in a period of time (ie a month, a week, a day) before its considered bad.
And yes different account types have different limits, again the wise thing is to ask what limits there are so you avoid triggering their freeze mechanisms.
In my country moving about 400 USD can freeze an account, consider yourself lucky...
Savings account have the lowest limits, followed by the checking account (both personal), then come the business type etc. Depends on bank and country, but the important thing is always ask before using it, so you know what to expect and not get surprises.
Most banks should just move your status up to the next one if you have larger movements. They also offer you a discount on fees.