Midas Touch is a buff and a relic that can be obtained from treasure chests (Buff Counterpart), trading or excavations (Relic Counterpart).
This Buff/Relic can do the following:
Buff Counterpart: Increases the chance for selling 2x the price when selling minerals and isotopes by 50% for 20 minutes (Paused during timelapse)
Relic Counterpart: Increases chance of selling for 2x the price when selling minerals and isotopes by 5% (increased with either warped rarity for 7% or divine rarity for 10%, see the core for more information).
You can stack the Midas Touch buffs up to 100% through either cave/scientist buff, trade buff (which is separate), or through relics. Buffs from these different sources stack, and is a useful tool for making a lot more money than normal through material selling. At 100%, every time you sell any material, it will get the 2x bonus.