Professor Thaddeus Poindexter McButtonwaithe has spent a life time studying BBL. His findings reveal two distinct kinds of BBL detritus.
The first kind is a vestigial umbilical plug which we lose by age 9 and the second being regular PPL pocket like lint. Since no one saves the umbilical plug it is one of the most rare substances on Earth.
However rare, Wall street has invented the virtual umbilical plug and trades them as VD virtual debentured derivatives. Their unit gram value = .001 Bitcoin. The virtual value = 2 Fantasy Football trades.

For more detail see Dark Web