Personal note: Metro guys arrived a bit late, but hey, better late than ever.
A cryptocurrency is a digital currency where encryption techniques are used to regulate the generation of units of currency and verify the transfer of funds without a central bank.
What is a bitcoin?
Bitcoin is decentralised, which means that no single authority or institution holds or controls the bitcoins.
Regular currency is controlled by one governing authority such as a central bank. If the country requires more money it can print more money but that devalues the currency and leads to inflation.
More @
http://metro.co.uk/2017/08/28/what-is-bitcoin-and-how-much-is-it-worth-6884318/
