A value of $210 for one ounce of silver is a reasonable pricing for the year 2012.
Many investors buy precious metals as real tangible assets.
Silver besides of being а good investment alternative for diversification play in times of economic uncertainty and currency instability.
Silver has soared on Inflationary risks basically coming aggressive monetary stimulus such as the Fed monetary easing programs i.e. QE2. Further monetary support will likely provide an important catalyst to the upside.  Even if  you need to factor that silver prices are volatile and can change significantly,  that means that  your strategy  plan is  to buy and hold for the long term instead of  trying to time the entries and exits because most probably will get the timing wrong and lose money. One more price appreciation factor in comparison of the demand for the gold is the growing industrial demand for this precious metal for being а key component of so many digital products. Silver is already found in just about every electronic device modern society runs on, from appliances to cell phones to computers to MP players. Every day, the world takes roughly 1.75 million ounces of silver from the earth and we consume more than 2 million ounces a consistent, rather rapidly drying up our exhausted silver reserves, supplies will become even rarer as the rest of the world ramps up its usage of silver.  
A $210 an ounce is a realistic price in today's money, more than seven times the current price.