If you took out a mortgage this fall, you're paying a higher interest rate than SpaceX. CoreWeave buys the exact same Nvidia chips SpaceX does, and the bond market is charging it 16%. That's a lot closer to your credit card than your mortgage, and it's going to decide which AI companies are still around in 2028. SpaceX sold bonds this summer that pay 5.35% through 2031. CoreWeave has bonds due the same year, and this month their yield shot past 16%, which is the range where lenders start…