The reason is the metal's volatility in the market and long-term investment involved in buying physical metal. ETF is an option to consider because it allows a person to trade a silver fund similar to stocks.
Not only that, it also tracks the price of this metal and is reasonably reliable. Although if you speculate with ETF, the price value, unless it is in really large amounts, cannot be redeemed in the form of the metal. But, this is a good option if an individual is not looking for long-term investment.
Purchased on the Community Exchange (COMEX), these are derivatives in the form of futures and options. COMEX is a subsidiary of New York Mercantile Exchange. It has tangible silver bullion for investors. Each certificate has a value corresponding to current market price of this metal. For instance, it tells the correct 925 silver price per gram.
Traditional method is possessing shares and stocks of a silver mining company. This is preferred by some investors, but there are a few risks involved. Mining, is an expensive and risky enterprise, and mining companies are subject to various factors, not dependent on price of the metal produced.
The good news is that the stocks of companies usually have a positive reaction to an increase in the price of this metal.
If you do not actually want to deal with this metal, go for silver certificates and digital silver currency. Although this form may not be actually very good, as these used to be issued in the past. The modern economic policy in the US does not support the distribution of precious metals in this form.
A thought can be given to silver futures. This market is mostly meant for advanced traders. These contracts have a time frame and are large and expensive. A relatively short-term investment method, but when executed properly, it is a precise way to know about its prices. Thus, all in all, all these methods can prove to be lucrative.
However, it is advisable that you research enough regarding the market condition and investments in general beforehand.