Bitcoin is not an actual physical coin, and if computers are shut down, you can't buy or sell them. That's why nothing will ever replace gold and silver coins themselves, and all investors should have them at home or in a safe deposit box.

And she told me that I should put it in a safe deposit box because it could be evidence one day,

If you like gold, there are many reasons you should like Bitcoin.

There are so many entities and individual investors who don't buy silver because they have no place to store it. The silver ETF overcomes that problem.

Silver and gold are not the only coin; virtue too passes current all over the world.

One suggestion my wife and I have used in our personal finance courses we teach at college is simply writing down all expenditures and seeing where the money goes. That alone will cause heads of households to think twice about x, y or z expenditure, and to consider carefully whether they really need something or not.