Assume that in 2014, an 1872 $20 double eagle sold for $17,200. what was the rate of return on this investment?

The rate of return on an 1872 $20 double gold eagle that sold for $17,200 in 2014 was $17,180 over 142 years. That is, there was a profit of nearly $121 per year since the gold eagle was bought for just $20 in 1872, and then resold for $17,200 in 2014.