Being the paranoid person I am, I don�t put too much faith in the Dollar lasting long term, or do I trust stocks, bonds, IRA�s, or even life insurance. If the economy crashes Silver would still be used (I hope) along with the growing solar energy market which uses silver, I think silver has nowhere to go but up in price, Just my thoughts.
In these line of thoughts maybe the ETF is not best option for you because of the counter party risk, remember MF Global.
When buying physical there is no counter party risk beside buying a fake silver, which should be avoided by doing your homework,
there is lots of videos on youtube about investing silver.
There is many ways to invest in silver, I have diversified my buying,
I got bars (from reputable sources),
925 sterling numismatic with face value,
999 pure rounds,
"antique" silver coins,
sterling silver objects
and some silver in physical silver trusts.
I dont have any ETFs, in the long term I dont trust the paper market which have ballooned over 100 times of the actual physical market.
Its not easy to find it below or around the spot price, but in the other hand, if it is too cheap,
be aware, there can be something fishy going on.
There is few ways to test silver beside acid test, sound is very telling and rare earth magnets can give some indication.
Do your research and happy hunting !