Billionaire investor Antonio Gracias of Valor Equity Partners extended a $1 million loan to Elon Musk in 2008, a time when SpaceX was widely reported to be under severe financial pressure and facing potential bankruptcy. The episode has since become part of the company's early history, often cited as an example of the precarious conditions surrounding SpaceX's formative years. More than a decade later, renewed attention on SpaceX's private marke…