If you serve both legal entities and individuals, then banks will stay away
what difference does it make to banks who will invest money?
Usually, regulatory authorities pay more attention to the movement funds from legal entities, and banks have even higher control. Much depends on the country and its laws.
You see how the authorities are struggling with anonymous currencies. Especially in the US, authorities are trying to ban the trading of almost all anonymous cryptocurrencies. Most likely in the near future, anonymity will only be ghostly. There are pros and cons here.
The state is afraid of losing control and regulation over financial resources, it is also an intermediary in the payment system, and this is additional income