Arkinslize
Jake does have a quest to find out the secrets of this underground base/ city, doesn't he? And as far as I can remember he can complete it at any point of time? Since he found the liquid alloy, which might be the biggest secret there, shouldn't he receive a reward corresponding to that achievement. Say, a soul glyph which makes the alloy lighter for him or something along the lines?
I would do what he did and then move the the rest to be in a pocket within the volcano. Itâs obvious that someone wants the liquid and will come back for it. His only hope is putting it in an area where itâs unlikely to be reached (Centre of the Volcano - Take advantage of his bloodline). Then come back for it if the ordeal allows.
Would have called over his crew to let them absorb some. Especially Will because the material has a price. I know Jake is supposed to think about himself most times, but since he does have a group of people that follow him, how about making them stronger for a price, too? Letting Tim know about making an Aether Core is another example that Jake mentioned he would have pressed Tim to do if he found out his bloodline, but he hasn't.
I would do combination of things first absorbing all I safely could,then eat my fill, after that move the rest to somewhere deep in a lava pool. Find my friends and get a very binding agreement that halve is mine and distribute the rest. If there is still more after that. It gets hid, in the molten lava again. There is no saying if I can return to this place again on day.