Bitcoin Cryptocurrency together with their underlying technology Blockchain was initially invented to replace bank, as the founder thought that central bank or government could publish fiat currency that could bring inflation to the market. Which is why bitcoin is limited to 21M supply in total.
In the early time, people really TRUST this idea, because of the limit of the coin that make its value increase. But those dream haven't reach its reality, many new players came in and build a profitable business on top of it ICO - Initial Coin Offering which leads to a lot of SCAM and market instability. Even the bitcoin community suffer from scalability and unity which leads to bitcoin folk that produce too many chain such as bitcoin cash, bitcoin gold, bitcoin diamond, ... and many other alternative coin which is not really based on early technology. Some might even change the consensus algorithm and data structure from chain of block to graph (TANGLE, HASHGRAPH, DAG).
A lot of people think that Blockchain and Cryptocurrency will replace bank, just like Internet will replace newspaper and television. But until today everything still exist as usually, we still see newspaper, television, and banks. Only the market size could be effected. By the way, even Bank creates their own Blockchain and some might have their own cryptocurrency. So the claims to replace bank is not realized.
Eventhough it is not realized, we do see the potential of blockchain technology. Eventhough news papers do still exist, their relevance has decreased tremendously. Many news paper companies have either shrunk in size considerably or went bankrupt.