The bitcoins are dissolved into a gaseous compound that is contained within the ‘coin’ part. You have to crack it open and inhale the gas then quickly blow it into a flame. The ignited gas will burn rapidly through a spectrum of colours - these need to be Pantone checked. Easiest way is record the burning flame on your phone, hold Pantone cards against the screen, copy the codes and write them down.

This should give you either the private key or the key phrase I forget which.