Bitcoin was born as a wholly digital currency, and it might have remained that way had it not been for the efforts of an early adopter from Utah. His name was Mike Caldwell, but on the Bitcointalk forum, he was better known as Casascius. The physical bitcoin creator took a digital phenomenon and converted into physical matter. For the first time in history, bitcoins were tactile.
Also read: Bitcoin History Part 3: Turning on the Faucet