Greed is humanity's natural desire to better themselves. Sometimes financially.
That's not greed. Reacquaint yourself with the definition ASAP.
True. Greed is (for me) the desire to better yourself while [not caring about] worsening others
No, that's
irresponsible greed.
Well, the question still stands. Do you have a better word for that desire? If so, then we can define greed as "irresponsible X."
Maybe 'irresponsible hoarding' could work.
But greed not only expresses the desire to better yourself, also the desire to obtain power to keep bettering yourself.
Dunno if irresponsible hoarding does the job.