Good arithmetic here, but: There is a reason the welthy, and most other people for that part, have little money and lots of stuff. The reason is the inflation. What you call appreciating assets, is mostly inflation-safe assets. With sound money it is different, you don't have to panic buy these assets, therefore the demand for sound money might be higher than for fiat money, supporting a higher money value.
A good point! People usually say that money is not wealth, but that is simply contradict with the modern theory of value: Value is decided by supply and demand, as long as there is a demand for money, it has value
The demand for fiat money as a saving medium is very limited because of its inflative nature, but the demand for bitcoin can grow forever because of its deflative nature. Since this currency is the most liquid format, many physical assets will be converted into it, and those will also back the value of bitcoin