To get an idea from recent history look at what happened in late 2008 and early 2009. Then do a comparison on the SLW chart with the DJIA to find that you would be many times better off with SLW. The next time the Dow tanks there is the probability that SLW will do even better.
Just looking at the chart comparison it looks like SLW did at least 5X better. Next time 10X better would not be out of the question, but you will have to wait till the Dow bottoms. Currently it looks like doing any investment in the market is a bad choice. The Dow, from the prospective here, is oversold. If it goes up from here it will be due to widely perceived double digit inflation, just as was the case in Zimbabwe, but that means people will have chosen paper investments to protect against monetary inflation. The Dow, by the way, for many years has been progressing through what appears to be a very long term H&S pattern, yet to complete, very visible if adjusted for inflation. Interestingly Yahoo’s display of the DJIA, which used to go back to 1929, is no longer available. What is available, if you use the linear option for the chart, is totally bogus, since the vertical axis is stretched to the point that the Dow plot nearly flat lines. Yahoo has been made aware of this but chooses not to fix the problem. Could it be the obvious H&S pattern? Yahoo’s top dog is a Democrat and an Obama supporter, just saying.
Be careful of those who are predicting a Dow of 30,000 or more in, say 20 years. If inflation is 10X the amount you will have lost and not gained whereas PMs should reflect their real value. This was the case in 2008 when the big losers were those with paper based assets, such as big banks and the wealthy that depended on their paper assets to grow their net worth. Beware of the coming "bail-ins" where the government will steal from the citizenry to cover massive losses.