Synthetic Mana is a form of artificially created energy that is used for various purposes, such as power sources, fuel, etc. These substances can be made in large quantities and stored away for many years in prime condition. What it has in quantity, it lacks in quality compared to natural Mana found in humans. Natural Mana is ten times purer and richer, making it vastly superior to the artificial version. Unfortunately, humans possess a limited supply of it, and extracting it is dangerous to them.
I am a young entrepreneur who has developed a scheme for securing high quality Mana. As extracting it from humans is illegal, I have begun targeting the more deplorable groups of society to allay suspicion. You know, the typical useless dregs who produce nothing of value and wouldn't be missed: liberals and illegal immigrants. In the case of the latter, my method involves attracting these people through advertisements to my country with the promise of work and eventually a green card. As they become settled, they will send for others (wives, husband's, children, etc). At some point, I will murder the families, extracting their Mana through a dark ritual, and dispose of the bodies in a crematorium to remove the evidence. As they were undocumented, it would appear as they never existed, making my plan foolproof.
Unfortunately, I have discovered that high quality mana is difficult to contain and store, making it more expensive to secure. Even after I have managed it, it tends to dissipate quickly, only lasting a few months at best. I am essentially spending more money for a product that lasts for a shorter timeframe, making this a failed investment.
How can this be the case?