DKB, Deutsche Kreditbank. Back in the days, there were stories about them randomly closing accounts interfering with bank accounts tied to cryptocurrencies, and since I have my main bank account with them where my salary et al goes, I sometimes tend to be proactive in such matters, even though I really hate that since it's none of their business really, and it feels a bit like anticiipatory obedience on my end. But what I hate even more is having a randomly closed bank account and dealing with the inevitable aftermath when the payments to those who managed to secured a slice of my monthly pie don't go through, anymore. As we say here in .de, "Einen Tod muss man sterben.".

tl;dr: DKB.