Clearly Bitcoin not a financial pyramid in any way.
It was the first crypto and now it's cost so much because people believe in it and use it + capitalization of BTC is still bigger than any other crypto. Due to the limited quantity (21 million) price become higher every year.
When it became popular and widely accepted as a regular payment method, it will gain more people who will have an impact on the market price(as it was before the January).

Financial pyramids based on extra income/greed and manipulations with the help of new users and their donations.

Bitcoin market price is manipulated buy bears and bulls, which have nothing in common with financial pyramid.