Where did the money come from? What was he planning to do with it? From the [1] TimesOnline, :

A SUICIDE bomber who killed eight people at Aldgate Tube station on July 7 left £121,000.

The origins of Shehzad Tanweer’s riches are unknown as the 22-year-old terrorist worked part time at his family’s chip shop in Beeston, Leeds.

The figure of £121,000 is the net value of his estate after loans, debts and funeral costs were paid....

It also emerged that the bomber’s father, Mohammed Muntaz Tanweer, has applied for a letter of administration to take over his son’s estate.