In 2008, there was a huge economic catastrophe in the world. Some banks conspired and deliberately caused this economic disaster. This is why many people were financially disadvantaged and lost their trust in the bank. I think Satoshi made bitcoin to save people from this disaster. That is, Satoshi has created a currency where there is no third party. There will be no central bank. No one can control it. Customer to customer transactions can be done. While Bitcoin has no controller, no one will be able to intentionally disrupt its finances. Bitcoin introduced a new horizon to the world's economy and freed people from this economic catastrophe.
So I think this is why Bitcoin was created. Is that the only reason? Or are there more reasons? What is your opinion?
Maybe it started with Blockchain Technologies since that is where Bitcoin is mostly developed. It also started when people wanted a way to pay anybody without cash and that might started Bitcoin thus, the Cryptocurrencies. At first it was not expected to blow up since some guy bought some pizza with a lot of Bitcoin but as time passes by, Bitcoin is dubbed as one of the best creation in the digital world..