A US banknote weighs approximately one gram, so if you could fit 3 kg tightly bundled on one shovel load that would be $3000 per shovel load.

Let's say you work 24 hours a day and can shovel 8000 loads into the fire a day.

That's maybe 24 million a day

So the answer is likely that they are destroying the $44bn more rapidly than you could shovel it

If Musk is in a Brewster's Millions scenario, he's doing fantastically well. The rules stipulate that he must not spend his money foolishly, but after spending his money on a leveraged buyout of a company that could reasonably have been worth a particular amount at time of offer, driving down the value of the company with foolish decisions is within the rules.

I'm willing to give it the old college try. For, uh, science.