I live very high.
On top of the home of all dreams.
When treated right I can really gleam.
When treated wrong I'll fall.
But I'll leave even more brightness behind.
But even this will your sadness not console.
What am I?
I live very high.
On top of the home of all dreams.
When treated right I can really gleam.
When treated wrong I'll fall.
But I'll leave even more brightness behind.
But even this will your sadness not console.
What am I?
I believe you are
hair.
I live very high. On top of the home of all dreams.
Can't get higher on a person than the top of their head.
Where do dreams live? Only in our minds--in our brains. Hair is on top of that.
When treated right I can really gleam.
Well-cared-for hair, according to countless hair product commercials, is supposed to be shiny or glossy; indeed, to gleam.
When treated wrong I'll fall.
Badly treated hair can fall out.
But I'll leave even more brightness behind.
Losing enough hair to go fully or partially bald leaves a shiny bare scalp behind.
But even this will your sadness not console.
Many people are sad to lose their hair.
Are you
spectacles or glasses
I live very high
Very high in terms of your body
On top of the home of all dreams.
On top of eyes
When treated right I can really gleam.
You can help get a fine vision
When treated wrong I'll fall.
I not properly wore, specs tend to fall
But I'll leave even more brightness behind.
Glasses will be shattered creating more reflections and/or refraction
But even this will your sadness not console
But broken glasses won't make one happy
I'll probably get downvoted to oblivion, but I think you're...
a plane.
I live very high.
On top of the home of all dreams.
Planes are made on the ground, but spend so much more time flying that you can consider them to "live high".
When treated right I can really gleam.
When treated wrong I'll fall.
When its maintenance is done properly and it's used correctly, you can get the best out of it (figuratively make it "gleam"), otherwise it can crash. Also, functional planes have lights that "gleam" at night.
But I'll leave even more brightness behind.
When it crashes, it can explode.
But even this will your sadness not console.
People (especially your relatives) dying just isn't easy to forget.
Even if the answer has been given, I'll leave this interpretation of mine.
I thought about:
Ozone
On top of the home of all dreams.
The world, the home of all dreaming humans
When treated right I can really gleam.
When hit by the solar wind, it glows.
When treated wrong I'll fall.
People polluting the world will cause the ozone levels to drop
But I'll leave even more brightness behind.
The sun rays will be even stronger without the ozone protection
But even this will your sadness not console.
UV-A, UV-B and UV-C rays will cause cancer and other diseases, making people really sad
Is it
a Star?
Maybe the fall is shooting star and the sadness is not consoled by even the beauty of stars
A previously mentioned possibility matches exactly if viewed in a different perspective:
a star on top of a Christmas tree
On top of the home of all dreams.
a Christmas tree represents hopes, expectations and dreams that kids (and a few adults) see fulfilled on Christmas' day, whether by the act of giving or receiving. The star is placed on top of that tree, and thus on top of that "home of all dreams".
When treated right I can really gleam.
whether a plastic star or a paper star covered in shiny confetti, it will gleam when properly illuminated.
When treated wrong I'll fall.
if badly placed and if the tree is shaken, the star will fall.
But I'll leave even more brightness behind.
if broken or dragged around, it will leave a shiny trail of confetti or pieces.
But even this will your sadness not console.
you will have to clean up the mess of a broken star (or tree) and get a new one to replace it until Christmas festivities ends.
Hohoho! Happy new year!