Subway accepts Bitcoin, so users can sandwich themselves on the Lightning Network

World's Largest Franchise Subway Tests Lightning Network's Layer 2 Bitcoin Payments Solution and Receives Encouraging Results in Berlin, in Germany.

No, it's not Groundhog Day. Subway is once again accepting Bitcoin (BTC), but this time it's using the fast, nearly free Bitcoin Lightning network.

Kick off the 7-day #usingbitcoin week with lunch at Subway, Chausseestrasse in Berlin!

50% off paying with #bitcoin#spendyourbitcoin pic.twitter.com/f81kdMOnEQ

The world's largest franchise by number of restaurants is testing bitcoin payments in three metros in the German capital, Berlin. Subway first experimented with Bitcoin nearly 13 years ago in Moscow, Russia.

Over the past few months, Daniel Hinze, the owner of the Berlin Subway franchise, has recorded over 120 Bitcoin transactions. In an interview with Cointelegraph, Hinze explained his desire "to help Bitcoin become money".

"Five years ago I started to deal with cryptocurrencies; and in the last two years I have dealt very intensively with the subject of Bitcoin. With this in mind, I decided that [Bitcoin] might be the best money system."

Bitcoin is not a popular medium of exchange in Europe,