(I am writing the riddle in third person)
For some who believe, it is a ghost
Depending on others, it may boast.
Its elder twin is quite selfish.
Even the dead feel bad, especially Elvis.
Today, its uses are vast.
One can decide its caste.
one uses it all the time.
Doesn't cost one a dime.
It's only 53. So, still a long way to go.
Begin to worry if one doesn't know.
After all, it's a masterpiece for a few..
No, it hasn't got anything with dew.
There's a reason this riddle is written in third person.