10% interest rate per year is not enough, I think rate must be higher. And the second question would be the trust - how can measure the BTC bank trust, if you are going to transfer them higher BTC amount ?
The higher rate, the more change you will get scammed! 10% should be reasonable! Even for the big popular trusted Bitcoin related business, you might be safe to deposit coins there but there is still small chance they get hacked! Just invest what you can afford to lose!
I also agree that the higher rate the more chance you will be scammed. Bitcoin is the owner of the people and there is no way a big business is going to take control of it in a bank form and make money. If they try this, the people will not pay the high interest and will walk away. SAY NO TO BITCOIN BANK