Physical silver was the first thing I began investing in. It seemed like a no-brainer due to several fundamental bullish factors such as the gold/silver ratio, diminishing supply and increasing demand, and the US Dollar's eventual demise.
I found out about Bitcoin shortly before I started buying silver in 2012, and I decided that "if you can't hold it you don't own it". Silver remains my favorite investment of all, but my skepticism of BTC 5 years ago sure cost me a ton of potential profit.