Greed is bettering yourself beyond reasonable. While [not caring about] worsening others.
All well and good, but we're
not looking for a definition of the word greed. What we're looking for is a word to replace it to mean the natural and commendable desire to better yourself and obtain the power necessary to continue bettering yourself. Whereupon we can then
use that word in the definition of the word greed.
Until then, for lack of a better word, I'll continue to use greed, and consider what you call "greed" to be "irresponsible greed"