Why did my BTC address change?
There is no reason to worry! In fact, we automatically generate a new address for you after each transaction you make, or when funds are transferred between your wallet and our storage system. This is done to protect your privacy, so that a third party cannot view all your transactions using the blockchain system.
All addresses that have been generated for your account will still be associated with your account forever. They are safe to reuse for future payments, but we recommend using the new address for all new transactions.