If you have ingeniously thought of an indisputable explanation, click on the title.

I'm had by all, some two, three, four.

Some rich have few and poor have more.

There's something in me, though not clear.

Though shatterproof, don't drop me, dear.

You get me, keep, though half might change,

But never use, save with those strange.

'Why do you keep sending me watches?'
'To intimidate you.'
'How would that possibly intimidate me?'
'I'm watching you.'

Riddle Answer A Name

Riddle Explanation
there's something in me, though not clear - what's in a name? A frequently referenced line from Shakespeare’s Romeo and Juliet.

though shatterproof, don't drop me, dear - to drop a name.