Cryptocurrency is a digital financial currency secured by cryptography. This digital currency looks like money in your bank account but you can't keep it in physical form in your pocket. Thus, cryptocurrency being a digital currency have no physical existence, but you can buy it, sell it and store it into your digital wallet.
Bitcoin is known to be the first cryptocurrency introduced by Satoshi Nakamoto in year 2009 and from that day onward Bitcoin enjoys the fame of being world's most traded cryptocurrency with unparalleled returns to its investors.
At present more than 1500 cryptocurrencies are being traded worldwide and the number is growing matchlessly. Few popular cryptocurrencies are Bitcoin, Ethereum, Binance coin, Solana, Cardano etc.