That's the right decision, even though if the sum is big bank can ask you the details, it is still the safest option for you, I believe, which is really important.
Actually right now I am a student and my earning source is also from the crypto space that is why I faced issued with the bank transaction one of the bank of our country already mail me that I have to upgrade the source of income and also the recent past transaction source.
I was just shocked! Even when I physically contact with the branch one of their employees suggest me to withdraw my all fund from the bank because if I can't show any document may be my account can be freeze.
And that's what I did, I withdrew all my funds from that bank and kept them in cash. And currently, I only use my cryptos converted to fiat currency through mobile banking. But I'm worried about when I'll be warned about mobile banking again.