You're confusing having value to others with having value to yourself.
I can be happy with a nice rock I found on the beach if I really love it and it's important to me. However, what we are taking about here is are assets which have a wider value on an open market.
Yeah but if it has value to me it probably does to others. These kind of things, good houses, land, gold etc. have a good record of retaining some sort of value over long periods of time.