Tether is investing its massive profits into AI and neural implant companies with assistance from controversial tech investor Christian Angermayer. It has already spent $1.5 billion on majority stakes in Northern Data, a German data center operator, and brain-computer interface maker Blackrock Neurotech. These deals mark an expansion of Tether's business from stablecoins, where it earns $4 billion annually, into new technologies, though Angermayer has a questionable track record on past deals.