I have been watching silver closely for forty years, and for me, any silver under $75-$100 an ounce right now is cheap, cheap, cheaper-than-cheap.
The historic value/price ratio of silver to gold is roughly 16:1, which is roughly the ratio that both metals are found in the Earth when they are mined. Right now that ratio is roughly 51:1 on the market. I don't care how much of that might be attributed to a gold bubble. That is a very, very unnatural, artificial ratio - I think too much even to count for gold speculation, especially when other factors are considered.
Gold has been so prized, so expensive throughout history, that most of it is recycled - rarely is it consumed, and only in minute amounts when that happens. In other words, most of the gold that has been mined on Earth is still in existence. Silver, on the other hand, has not fared so well. Silver is consumed in many one-way processes in MASSIVE quantities every day. Add to that the fact that the price of silver was artificially suppressed, and kept artificially low for so, SO many years, even against the ever free-falling dollar, that its consumption was never held in check, making it even more scarce as a result than it otherwise would have been. Add to even that the number of new "consumption-based" uses for silver that are just being realized, and we have what appears to me a New Gold on the horizon.
I could be wrong, of course, but I am one who strongly believes that most of the silver represented in the world is little more than paper derivatives that will ultimately be worthless, and that real physical silver is far, far more scarce than even the big-name alarmists realize. It may even turn out that the available silver is more rare than gold. Even if that is not the case, I tell everyone I know and love not to even consider buying paper silver in any form. That, to me, would be like making a gold coin deposit sometime prior to the bank runs that prompted Roosevelt to declare a bank holiday, with the rest of that story well known in all its infamy. Someday, possibly sooner than anyone realizes, most of the silver paper derivatives may be "not worth a Continental".
Most of what I have (all decent quality, non-numismatic value "junk" coins) was bought at much lower prices than today, but the fact that it has gone up in price hasn't discouraged or slowed me down at all. While many silver investors have been wringing their hands for years at all the price manipulations that have been going on, which made it impossible for them to take profits on their "investment", I have looked at it as nothing but time; time for me to gather even more, because I'm looking for a reliable store of wealth - not a way to make a profit.
So my opinion: Buy, Buy, Buy. If you're thinking short term, go ahead and sweat all the ups and downs. If you're thinking long term, don't sweat a thing, your money is safe -- as long as you have physical possession, and not a promise to deliver later.