It's called "greed." It is the love of money and it is the root of all evil.
There is no sin in wanting a more secure life for your family.
I’ve met some of these folks. They didn’t love money to an undue degree. They simply wanted more — which does not define greed.
More precisely it's envy, keeping up with the Joneses after they brag about their stock or real estate profits. True greed is fairly rare, and the greedy tend to end up in jail under their own power, but envy is in great oversupply. The first murder in the bible was over envy, not greed. So much of what is claimed to be greed is really someone projecting their envy. Envy is the root of most evil.
Money is just information and banks are just information businesses. If you go in the back office you won't see mounds of evil paper cash but a tiny computer hooked into other computers. Money is not evil, it's information on how much useful wealth you have created for your fellow man but have not yet exchanged for something else.