Bitcoins are the future currency. In coming years, bitcoin can be expected to replace the current physical currency. The benefits of bitcoin are that it can be transferred peer to peer without need of a third party buyer like banks or other financial institutions. Bitcoins are incresingly used to buy almost everything now a days. You can use it to buy the Garmin GPS Map Updates. Though the garmin website provides it free of cost, so you can easily update your GPS software by visiting : garmin express/
You can also visit : garmin.com/express