Well, the bitcoin market system is indeed a pyramid scheme.
No. You are wrong. Look it up, there are very clear definitions.
But the problem is that in an economical perspective, money shouldn't be considered mainly as value. Money should be the intermediate tool to help trade value, not be value by itself.
That's just armchair pseudo-philosophy. No, economic religion more likely. You can't buy things with money without money being valuable. It always amazes me how hard it is for people to accept reality for what it is.