ftfy.
In his original
white paper Satoshi Nakamoto simply wrote:
And the title of the white paper is "
Bitcoin: A Peer-to-Peer Electronic Cash System". So yes, the two are closely linked.
His blockchain software achieved this. Any hype about bitcoin replacing banks or fiat currencies came from others - mostly libertarians.
So you admit that blockchain was developed specifically to implement 'digital cash', not for any other purpose. And this was supposed to replace traditional payment methods using fiat currency, which is why the white paper calls it 'cash'.
The introduction says:-
Commerce on the Internet has come to rely almost exclusively on financial institutions serving as trusted third parties to process electronic payments... What is needed is an electronic payment system based on cryptographic proof instead of trust, allowing any two willing parties to transact directly with each other without the need for a trusted third party.
First off, whether it's needed is debatable. I've been using PayPal since 2002 and never had a problem. 'Financial institutions' have been taking care of my money since 1962, again without any issues. Having a 'trusted third party' recently helped prevent my neighbor from losing NZ$10,000 to a scammer (with Bitcoin she would have been screwed).
But libertarians hate central banks and fiat currency, and desperately seek an alternative that doesn't involve a 'trusted third party'. It's no coincidence that 'Satoshi Nakamoto' designed exactly that. Want proof that he was one of them? Here it is:-
Bitcoin: 2008-2009: creation
On 3 January 2009, the bitcoin network was created when Nakamoto mined the starting block of the chain, known as the genesis block. Embedded in this block was the text "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks"
Cryptographic algorithms were known about before then. Nakamoto's innovation was to create a digital currency using a distributed ledger of records (blocks) linked together via cryptographic hashes - thus the name 'blockchain'. So (at that time) Bitcoin and blockchain were essentially the same. Bitcoin was the 'app', while blockchain was the mechanism inside which made it work.
But the basic design had a serious flaw - the system is secure only so long as honest nodes collectively control more CPU power than any cooperating group of attacker nodes. Nakamoto's answer to this was to make the 'difficulty' (CPU power required) increase as the rate of blocks processed increases. Anyone who knows the history of computers can see the problem here - as soon as big money gets invloved it will induce an 'arms race' of ever-increasing compute power. The result is that each Bitcoin mined increases in 'value' over time, as newer ones cost more to 'mine'. This makes the 'digital currency' inherently deflationary, encouraging speculation.
It didn't have to be done this way, but this design would appeal to a libertarian who railed against 'worthless' deflatationary fiat. We know Nakamoto thought this way from the text he imbedded into that starting block. This ideology may have blinded him to what such a design meant. But even if he didn't see it initially, he must have realized that mining a large number of Bitcoins could potentially make someone rich if the currency took off. And mine them he did - creating ~1.1 million in the fiirst year. The cost to him at that time was trivial. Today it is 'worth' ~$75 billion. Assuming he can still access his Bitcoins, that makes 'Satoshi Nakamoto' insanely rich for practically no effort. There's a name for that too...