If you withdraw cash regularly it will get you flagged by the bank and you will probably have to answer some questions. Answering wrongly will get you terminated as a client.
Can you say something about the sums? I (in germany) got my rent money every month from my parents while I was a student. No problem. I withdraw something like 100€ per week for bars, backeries and other small expenses and I never ever had any problems.
It buffles me that so many people are jumping to conclusions although you provided so little context.
If you have a cash inflow of 50k per month and withdrow that much, the bank may think you pay people in cash, avoiding taxes (like on construction sites). Which is totaly legit IMO. But again, you gave almost no context..
Many banks have been blocking crypto transactions because it's the main currency of choice for organised crime to move money across borders in the modern era. My bank has sent me a message telling me that they will block any transaction they think is related to crypto, and if I want to use crypto I'm free to use other banks. Simple.
I think that's their choice. They can make that decision, and it's fine.
Why do you think you are entitled to demand a private enterprise allows you to use their services in any way you see fit without asking you questions?
I don't think that is true, at least not EU wide. I frequently (have to) use cash and I was never flagged by any of my banks or had to provide any sort of receipts for my transactions, not the local one and not the international ones. The only exception was the sale of my car, as the transaction exceeded 10k, I had to provide a short explanation, which in my case was the purchasing agreement.
I am really curious how this has proven to be an issue for you or if this is just another banks bad crpyto thing?