Now this is an ingenious idea, you could turn your staircase into storage compartments. The stipulation would be that the staircase would be made out of wood, in our case it would be difficult to implement in the Middle East since most houses are made of concrete.

The staircase would be a little heavy to move if it was concrete or marble, but still its an ingenious idea and it would really be secure storage.

Link: Gizmag