Why Tuppence?

Why was Des Moran called "Tuppence" and why was he wasted?

gg

Well the Fat wog said to the Skinny wog----and then

Chk Chk BANG!

Quick EDIT it while you can
boom

I am guessing...I know of people that were called their juvenile or even baby names for all of their lives....eg little tuppence or threepence.
Why was he killed ? another guess ...when Lewis Moran...gangland brother of Tuppence was killed the money went to Tuppence,,,not to the widow,
The money would have been unaccounted for proceeds of crime I suppose.This may have been an ongoing grievance for the widow and she may have believed she should have at least shared in the unofficial will.
Once again only guesses.