Based on my experiences and experiences of people I know, Hungary works very well for money in/out without real limits. And bank transfers (at least SEPA) can be done with any amount, no one will block you, or suspend or anything .. Never heard this till now (for cash out crypto, any amount / 7 figures+ of local or oversea real estate selling-buying / dividends from abroad / even I had one good friend cash-out few year ago almost 7 figures from EPT Poker tour without being resident.. no pb).
CZ I know less, but as I saw, banks look more strict.
I don't understand the point with the 15% of tax in HU or CZ ? It has to be paid only if you are tax resident there. Passing the money by these banks dont make you tax resident...
For sure now it's less easy to open bank account as non-resident compare to 10years ago.. But if you can open it, I think it's worth it for 'easy' european banking and not considered as 'grey' banking.
lets say if somebody from germany goes to hungary to open an account there and cash out 6 figures, wouldnt it be reported from hungary to the german authorities and they would ask after a while where this person got the crypto from to begin with?