I think they should just sell their antimatter. I bet you could sell it for billions per microgram.
Just imagine the unboxing videos.
Hey guys, it's xxStreamer420Xx, and today we're going to be unboxing dark matter from t̵̨̢͈͔̘̣̪͖̾̓̋͒̿̈́͘ḧ̷͙͈͕͉͙́̽̀̍́̚̕ȇ̸̻͎͇̥͚̪̬͛̒͑̕͝͠ ̴̢̖̞͓̬̩̭̦̰̠͔͎͔̟͙̋͆̄̅̎́͌̇͘͘͝͝͠a̴̧͉͎̹̅̃̓͋̅͛͗͠͠b̵̨͕͎͖͙̠̣̭̉̽̓͛͜y̴̡̡̛̹͖͇̙̝͜ş̶̝̮̻̙͉̤͚͍̪̩͓̞̓̔͛̇͑̓̎̀̑͌̊͜s̵̬̰͖̅̒̉̄̓͒̋͋̈̓̆͊͋͘͝.