Since 2008 that bitcoin a decentralized currency came in to existence many investors have been doing their best to advance bit coin since it was the first crypto currency.
This is not correct information, so you need to read and learn more before posting.Bitcoin prehistory.
There are several cryptocurrencies created before Bitcoin according to Bitcoin Prehistory diagram, and Bitcoin is not a first one, but it's acceptable and accurate if you say Bitcoin is a first successful cryptocurrency.