Hey, Silhelmus here, writing about my personal experience in dealing with my bank.
I’m from the Netherlands, and customer of one of the larger banks (Rabobank).
I called them up, asking about trading cryptocurrency without any licenses.
Had a nice chat and the lady told me it was legal, but I could get some problems/questions if the frequency/amount of trades triggered money laundering detection.
I was told to keep track of who bought what, and I should be able to show them the receipts for all my purchases.
In my opinion, nothing crazy, should be smooth sailing for the average trader on here. I recommend you guys also checking in with your bank before you start trading big here.