I (and the people I work with, whose experiences I learn from) don't have a problem declaring SOW/SOF in detail going back years, so I'm not sure if my experience is helpful for you.
Can they trust you? Can you be completely 100% honest and transparent about where your money come from?
I meant the SafeGuard of BCC as well - their website says the following:
The Malta Depositor Compensation Scheme does not apply to your Account and BCC. But we take the security of your money very seriously. We shall safeguard all funds received from you.
Such funds shall be deposited in a separate bank account in a credit institution domiciled in a reputable jurisdiction. So in the unlikely event of any insolvency, funds that have reached your Account will be protected against claims by creditors.
What if they decided to go bankrupt and cash out all the money from their clients....