There is no interest!
Many financial experts keep saying when it comes to the investment in gold & co.:
"Gold pays no interest!"
Yes, of course, precious metals bring no interest!
... just as shares, because they are real values and not money value like bonds.
But it is important to consider the profitability of an investment, which is represented as a return on capital.
In the following overviews you can find the returns per year of the precious metals in the recent years: