Your domain hints at a nonprofit or activist theme.
Those topics are often addressed by .ORG instead of .COM.
Also, they prefer to accentuate the positive rather than the negative aspects of what they do. So, for example, a suicide prevention campaign might use a domain containing a keyword like "Life".
Using "struggles" accentuates something a little bit negative.
Also, WorldStruggles.com is too broad. Most causes are more specific -- e.g. "Save The Whales" or "Cancer Survivors".
These issues put together mean that it is VERY unlikely that someone will think of your domain first, prefer it above all other options, and then decide to pay you extra for it.
Don't renew this one. Nice try, though!