Crypto is nowhere as anonymous as everybody appears to believe. Every single transaction is on the blockchain, and can be traced from acquisition to being spent. Considering that all European exchanges are now obliged to report their customer details to the authorities (under the KYC of AMLD-V EU directive), it becomes a relatively simple matter to trace your money to crypto transactions.

Fortunately, Europe isn’t hit as hard with the customer profiling as the US is, and the EU is rather intent on protecting privacy, so your data purchase history is available only to youths relevant parties.

In case of MobilePay, the service provider can of course see the details, but all my bank sees is a text I’ve input when sending money, or what the sender has input. It still gets reported to the tax authorities.