Product allowing to store your bitcoins (BTC), quite fascinating you will discover it.
"Opendime is a small USB stick that allows you to spend Bitcoin like a dollar bill. Pass it along multiple times. Connect to any USB to check balance. Unseal anytime to spend online. Trust no one. "
OpenDime makes it easy to make off-chain exchanges, in real life.
How to use an OpenDime?
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sources:
opendime.com
coinkite.com