Firstly, you are going to need to use a centralized exchange here. Centralized exchange have KYC so they are able to verify your identity and other information. If you are using a centralized exchange and one that has good reputation then the chances of your bank raising questions might reduce.
I believe KYC is not good for OP need.Quote
There’s really no sure way of preventing banks from asking questions without having to show them that you are indeed just transferring some of your money and no illegal activity is happening. However just make sure that when they do raise questions you are equipped with the required documents and hoping you are not evading any taxes because that will surely put you in trouble.
When you cash out, it's really hard to know that your trade partner has clean money or dark money. No one can knows but you can reduce your risk by choosing trade partners with good past successful trades in both number of trades and trading volume. It can reduce risk to trade with new accounts with money from dark sources.It is only kind of carefulness and prevention but can not be perfect because if that senior trade partner is from a dark group, who knows what will wait for you. When you trade peer to peer, digitally, you take risk already.
