You are just putting a negative spin on things that are not necessarily negative. The last one is not at all specific to crypto.

Let's not forget that monitary structures are currently backed by governments, crypto offers a way out of the risks associated with that structure as well. Of course if crypto ever takes off it will end up controlled by corporations which is not inherently better, but at least it offers a choice / way out from governmental whims.

A lot of technological changes start as things trying to find problems to solve - that's often how discovery works.

I don't share your confidence. Clearly crypto isn't going to sprout in popularity any time soon, but there aren't nails in this coffin.