I don't think that black metals are good for saving money in a long-term period. Their storage and security costs are too high to save near that value over time.
I think they are good materials only if you want use them in infrastructure, otherwise they will taking space in storeroom without point.
The best option for saving money for long term in my view is to invest in property, because property will never lose money and with the passage of time the value of your property will increase. If you put your money in bank, you will spend it after some time because of easy access. If you invest in crypto, it is also usable and not good for long term savings.
Saving money for long term is good but itsto much hard to save in your home. Because no one know when you need the money also we should not save our money in banks too because they applied tax when you withdraw it and apply some charges.
That is right, it is really hard to save your money especially when you are already a parent, maybe a father or a mother of a family. Instead of you are the only one using the money, you are ought to use that for your family.
That is the responsibility of the parents, they should take care of their family. But that is really great if you will be able to do that. Children usually have some emergencies like having some accidents, hope it don't really happen or something you need to pay immediately. In that cases if you have savings, you will be able to pay them using your savings.