Not really speculation. DRAM manufacturing capacity is split between like, 4 major manufacturers, and all of them already contracted out their full capacity for the next year - all the sales going towards AI hardware, B2B sales (because B2B is guaranteed big contract vs B2C where you're literally relying on every buyer and every sale separately). Which means little to no capacity for RAM module manufacturers, which means little to no supplies after current stocks run out.

Of course current stock being upmarked is end seller greed, and to prevent a sudden rush (just like with TP during COVID, if people hear about something being in limited supply, they panic buy, FOMO is a dangerous drug after all).