If someone know crypto currency and invest gold, I can not understand this situation. Maybe he/she does not like benefit
I can't understand your post either. Are you trying to say that someone who invest in gold even though he knows about crypto is not understandable or what?
-cut-
Exactly. People forget that fiat currency may be currency, but it isn't money. Money is currency, except it is also a proven store of value in the long term which is something that fiat currency definitely is not, since there aren't any fiat currencies that have survived for long over the course of history.
I really like this point. Fiat currency is something built on top of nothing but promise, as far as I understand about it. The government can print lots of fiat, which makes inflation is not possible to be avoided.