Hey. What is the most popular crypto currency in the world? 
Bitcoin is an online cryptocurrency introduced in 2009. It is a decentralised currency, which means that it does not have a central issuing institution and is therefore independent from banks, institutions and governments. Nobody controls it and does not directly profit from it. It is virtually limitless since it is available in every place with an Internet connection or access to mobile telephony. You can send it instantly to any place on Earth without any intermediaries and banks, there are no limits and negligible fees. It is a currency based on mathematics and cryptography, thanks to which it is the safest currency in the world, due to the fact that it cannot be artificially printed, falsified or blocked. All Bitcoin transactions are open but the currency itself is anonymous just as well as the parties to the transaction.