By definition, a cryptocurrency is based on DECENTRALIZATION
All existing cryptocurrencies developers will propose a wallet you can easily install and use on your computer
A cryptocurrency, by definition, is linked to a blockchain, which, by definition, is DECENTRALIZED
All transaction inside a blockchain are public and can we viewed with a blockchain explorer by anyone
A cryptocurrency, by definition can be sended, received, traded and converted into your local currency with ease
Onecoin-Onelife is a criminal organization ripping off the money of millions of naives people around the world. The bulgarian mafia is behind the project
Onecoin is under law investigation in a lot of countries
https://news.bitcoin.com/onecoin-offices-raided-in-sofia-servers-shut-down/
All your money is GONE ! It was used for orgies, yachting, real estate acquisition, champagne and cocaine.