Everyone who has access to internet can own and use cryptocurrencies yes!
Every person on the planet has the right to have access to money and financial products.
Using cryptocurrency must be easier and cheaper than regular currency if you have access to internet you can use it yes
KNOWN WELL CRYPTOCURRENCIES like Bitcoin, Steem,Ethereum, Bitcoin gold,Ripple etc
WHAT IS BLOCKCHAIN?
Most cryptocurrencies are based on innovational blockchain technology.
A blockchain is a public ledger of all transactions that have ever been executed.