Good things don't last, tell us you have prove and record that your bank account is earning that 3-10% every month, every year. After 5-10 years, maybe one can trust you.
It can be as simple as taking new member's $$ and paying you to make you think you are earning 3-10% every month aka MLM.
In this type of scheme, only the early adopters earn, the middle ones maybe barely break-even, the late joiners all lost their capital.
In the end, when not enough new members are joining, the house of cards comes falling down faster than you can withdraw your $$.
Also, if it's machine trading it tends to work until it don't because every machine in the world is trying to do that, and when every machine does the same, none will earn.
Also, likely, they won't reveal who is trading for you, saying what other banks would get to them if they reveal their identity or the place they work for will screw them etc etc.
They will say these are top top traders in the world.
They will also say if they under-perform they will be replaced.
Those 2 sentence contradict itself because unless you think top top traders are easy to find anywhere, there is no way they can fired the under-performing traders.
Alas, I do not know what your investment scheme is like, just stating the above as what others will do. 3-10% every month is not moderately reasonable, it's better than even warren buffett's record so don't be surprise that the mechanic behind this is a sham.