let's talk about the man who built the concept of bitcoin. David Chaum.
Pioneered the concept of blockchain technology you mean.
There are lots of history leading up to the creation of Bitcoin by Satoshi and that is definitely not disregarded when discussing cryptic financial technology, this however does not mean David Chaum built Bitcoin; Satoshi did.
With due respect to Satoshi for creating bitcoin, i felt fascinated with the fact that Chaum actually gave the basic concept of blockchain back in 1980s, when there was no internet and for such wonderful work in those pre internet era time we must be appreciate this person.
I believe Satoshi too would have found this man an inspiration and who knows he might would have referred his works to create bitcoin.
This post is to appreciate the contribution of Dr. Chaum.