Ok Shenoy small change in my answer

4th theif - 33 coin
5th theif - 33 coin
3rd theif - 1 coin
Me - 33 coin
Total - 100 coin

Why i took this decision is in the question its mention that all the theives are greedy including me... so i need more gold but at the same time i have to save my life... so this decision best suits in both the cases...
No need to melt the coin... Now i'm safe...

Thanks
Manoj