The main purpose of bitcoins was not to abolish fiat, but to show the world that digital money is possible to rise. Bitcoin is a cryptocurrency and a payment system. The system is peer-to-peer and transactions take place between users directly, without an intermediary. I beleive Bitcoins are created as a reward in a competition in which users offer their computing power to verify and record bitcoin transactions into the blockchain.
Digital money has existed for decades though. It has already 'risen'. Just take a look at your bank account or complete a credit or debit card transaction. They too are examples of digital money. The vast majority of 'money' currently in existence is digital money, not paper and coin. Bitcoin is an alternative
form of digital money, but it is not a
real alternative. In practical terms, it does not 'do' anything existing currencies don't already do. It does not actually address 'real-world' problems.
HS