Hypothesis:
Half-life is used as a measurement in which it takes an elements atomic mass to break down over time. They cut it in half because the time is so long. For example, Carbon 14's half life is 5730 years(+/- 40 yrs). So, "technically speaking" it takes over 10,000 years for Carbon 14(radiocarbon as its formally called in the scientific community) to break down.
Research:
Amauri's half life is 4.56 months, radically less than that of atomic elements. Now, generally the more unstable the atom the shorter the half-life. This shows that Amauri is more stable and will hence forth deteriorate at a more exponential rate that most formidable soccer players to date.
Conclusion:
Sell now.