If MicroStrategy's stock trades at a discount to its Bitcoin holdings (MNAV below 1), they will stop issuing shares. If cash reserves run low, they will be forced to sell Bitcoin, potentially triggering a debt spiral.
"In other words, the moment the market stops overpaying for their Bitcoin, everything flips. They stop issuing shares, cuz that would be like selling a dollar of Bitcoin for 80 to 90. You don't want to be selling your Bitcoin at a discount to anyone, right? And if the cash reserves are not enough and they run out, the only way to keep paying those preferred dividend investors is to start selling pieces of the Bitcoin pile. That is the structural comparison that people say looks a lot like a modern version of what could end up becoming the death spiral."