PayPal has confirmed that the service has reached 100 million active users. The company also said it expects total payment volume for mobile payment transactions to double in 2011 to $3 billion. The company also predicted that by 2015, the wallet will become a thing of the past. PayPal President Scott Thompson said in a blog post. “We believe that by 2015 digital currency will be accepted everywhere in the U.S. – from your local corner store to Walmart. We will no longer need to carry a wallet.”