My entry into investing was buying stock in constellation 3D a fluorescent multi layer disc/card. At the time its capacity was up there (~1TB DVD in the late 19

My entry into investing was buying stock in constellation 3D a fluorescent multi layer disc/card. At the time its capacity was up there (~1TB DVD in the late 1990s). It was the clear discs and florescent layers that was interesting. The company folded and took my $3,000 with it.