As a very experienced software developer I just can't agree with your assessment that Bitcoin (and blockchain) was a brilliant technology and/or ground breaking concept.
Its standard is quite simple, there is nothing in it that I would categorize as an invention. It is a solution without a problem. As it became popular people have been trying to come up with problems that it could solve, and have been failing at that.
It is just re-inventing the wheel, but now with computers.