I used to keep 1BTC on my iPhone, so that it was handy and easy to access on short notice. I now only keep 100mBTC on it. Imagine that... a world where the value of your money goes up while your holding it. I first bought into BTC at $80 CAD and keeping 1BTC on my phone did not feel like much of a security risk. Today its trading at $2614.00 CAD. Thats more than my house payment.