These aircraft have been on the ground at KUL for about five years and at least one of them has been parted.
It would take a lot more than 150K in fuel to fly one out of there.
These 747s will sadly never fly again, but they did lead long and productive lives prior to their abandonment.
If anyone wants an airworthy 747, there are examples being flown to the desert every week, retired from the fleets of reputable airlines with full maintenance records.
This type is leaving active passenger fleets rapidly, although the few 747-8I aircraft delivered will likely be active to 2030 or so and many old 747 freighters will still fly after that, along with the handful of 747-8F aircraft delivered. There won't be many more, since Boeing won't be able to keep the line open at ever lower delivery rates.
The passing of the 747 from widespread service is the passing of a long era of commercial flight.
Some examples of the type might even remain active long enough to reach seventy years of the type in service.
Your grandkids children might see an occasional 747F taking off here and there.