I would rather view crypto currency as a currency of the internet, in other word, crypto currency are digital currency that are acceptable though not generally as there is still lots of persons around the globe that are yet to be aware of what crypto currency is all about. It is a means of payment digitally.
Good explanation mate, crypto currency is now famous all over the world people are using it to buy goods online, it is best investment as well, some use it as asset, it is future maker, our life is getting better for investing in crypto currency, there are so many profitable coins like bitcoin ETH and Ripple that people use to invest there money, more information can be taken from google and YouTube as well