When Elon Musk rang the bell on the SpaceX IPO and Michael Saylor immediately fired off a tweet declaring 25% of the Mag8 now holds Bitcoin, traders did not exactly need a second cup of coffee that morning. The historic listing of SPCX, valued at roughly $2.1 trillion, threw the spotlight back onto corporate Bitcoin treasuries, with Tesla and SpaceX leading the technology pack. Meanwhile, sharp-eyed presale hunters were busy looking somewhere else entirely.