cryptocurrencies to people are indivisible systemized currency, but cryptocurrency are digital currency such as bitcoin/steemit. They are digital
currencies in which encryption techniques are used to regulate
the generation of units of currency as well as verify the transfer
of funds, operating independently of a centralised authority or
bank.
They are so many cryptocurrency today but the question people are asking is "The fact that anyone can create new currencies
mean that in the longterm all currencies
and crypto might be devalued as more and
more cryptos are crated" but the more new Cryptos are created the more paper money will be devalued and some cryptos will be losing it value due to much cryptos.
The only way by which paper currency will still be of use is because it can be use for exchange of cryptos and is have less value than cryptocurrency. Some cryptocurrency have much value than paper currency but when too many cryptos are created what will be value of cryptocurrency?