and + 1 to the european banks gone crazy , I think there is a random yes/no generator as in regards to the accounts that use cryptocurrency
but I'm sure it depends on the banker , some of them are more flexible than the others and do not rush to comply with the rather vague instructions
the vast majority of the clerks who nag you for screenshots or the source of income are doing this to avoid any potential problems since crypto is in the grey area and they themselves are checked from time to time
Although EU has a lot of common rules and laws, it is very wrong to put all the banks of Eu in one basket.
The banking sector still is very different across the EU, some countries are stricter some less. And even in between one countries banks, there are a lot of differences. There could be one bank which are researching crypto and have understanding of it, but others will completley ban anything related to it. just to be sure that they won get a huge fine from regulators, because in the end bank is the one which pay it.