here's a great article, but to be honest I'd say they're being...

here's a great article, but to be honest I'd say they're being conservative, even at 400% over 3years. $138usd is the modern day high, adjusted for inflation of course, which we are nowhere near -

'Silver prices set to leap four-fold in three years'

http://www.ibtimes.com/articles/103068/20110120/silver-prices-set-to-leap-four-fold-in-three-years.htm

"Silver is currently priced in US dollars at $30 but could explode in price to $120 in just the next three years. That would be an incredible 300 percent gain on your investment," according to a report by thesilvershortage.com.

It quotes precious metals analyst Mark Thomas, who pointed out that silver has been outshining gold in the last 10 years. Thomas put forward some reasons that make an investment in silver very attractive.

Chief among his reasons is that a heavy central bank selling of silver for many years has kept the price artificially low, which made silver mining unprofitable. This has snowballed into a major silver supply crunch."