Bitcoin as a technology is not a pyramid scheme, just technology - crypto software! Everything else about bitcoin and as whole the cryptocurrencies is a pyramid scheme!
Maybe You are not in the Pyramid yet :) That's correct, there is also a negative value :)
Check where are You. What value of bitcoin You have?
If You have only satoshi, then You are not in the main Pyramid yet and You are in the negative/reflected Pyramid :)
You are in right of the decimal point ... When You are at left, then You are owner of bitcoin and You are in the positive Pyramid ... the main pyramid :)
The hungrier You are for satoshis/crumbs, the richer they will get!
There was river by the Pyramid. The Pyramid was reflected in the water.
The Pyramid have always other side :) And You are not in the main Pyramid yet!
You are in the Pyramid, which is reflected in the water. You are on the bottom and eat the crumbs :)