Cryptocurrency or crypto,is virtual or digital assets purchase with real money,you can buy it with dollars or with any currency depending on your country currency,crypto is being traded on blockchain technology.take note only on blockchain technology any other technology is a scam.crypto doesn't have all the values of real or fiat currencies,cryptocurrencies like BTC and other shitcoins are different from stocks and real money.crypto is not regulated like stocks or real money insured in bank,crypto high risks can offer big rewards or huge losses.my advice know what you are doing.