Your wallet's total spendable balance is a combination of the balances from all the Bitcoin addresses listed in the wallet. When spending bitcoins, the wallet is able to combine the balances of multiple addresses into one transaction.
It is important to note that Bitcoin was designed for its users to hold and manage their own keys. This makes it virtually impossible for another party to block, steal, or confiscate their money.
Intended as a gentle introduction to Bitcoin, this chapter introduces a centralized service, Circle, to help one get started with Bitcoin.
Circle's wallet service simplifies using Bitcoin by managing the addresses and private keys for you. This results in a clean online banking-like experience. ...