A Swiss technology company has started rolling out smart banknotes called Tangem Notes that offer a physical presence for cryptocurrencies. The "banknotes," which are actually plastic cards, have been launched for sale in a large store in Singapore and there are plans for a wider rollout throughout 2018 and 2019. Currently available Tangem banknotes are valued at 0.01 BTC and 0.05 BTC.
https://www.notebookcheck.net/Bitcoin-gets-physical.302124.0.html