Firstly in the olden days ,the means of exchange was trade -by-barter, Then it evolved to coins and then it lead to the use of paper notes,The development of currency changed into a new look as Bitcoin came to exist. Now the era of cyrptocurrency is the present and will be the future means of exchange,the future currency is cryptocurrency,NOW as you are reading this post,a lot of cyrptocurrencies continue trooping the blockchain, Now in many countries Bitcoin,Etherium,BCH,TRX,BNB and many more are used to purchase food items and other produce, Please dont forget to like and comment below and earn your BCH.
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Cryptocurrency us the future indeed cos most countries are using it to transact and that's just amazing