Why is vladek so concerned with money?

During the war money was the reason him and his wife survived.  He saves everything because one may never know when or where they might use it.  Vladek is use to being the one in control, he doesn’t want to rely on anyone else and become himself no longer of use.

Hope this helps!

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

where's the