If you invested into the German stock market in 1914, it would have taken over 100 years to get your money back.
The America of the past 100 years has been quite exceptional. Using its history to predict the future is not a good idea, IMO.
The America of the past 100 years has been quite exceptional. Using its history to predict the future is not a good idea, IMO.
The problem (or uncertainty) is that both the US and Germany left the gold-backed systems during those years and the exchange rate between our currencies changed quite a bit during the 1914-1924 period (which is probably why your parent chose that year).
If you notice your image's description, it is denominated in 3 different currencies, depending on the years you are looking at.
Im sure the result would be much better then.