1. 90% silver "junk" silver. (i.e. U.S. dimes, quarters and halves struck prior to 1965)
They are small demoninations and universally recognized.
2. Generic 'rounds' in the one ounce size. Also a somewhat small denomination. Easily useable as barter should things come to that.
3. 10 ounce bars. (more compact yet still not as unwieldy in trade as one ounce of gold, yet large enough for 'investment' size after the inevitable price jump)
All of the above are priced very close to spot (low premium) . Numismatic value is a no-no IMHO unless you are a true collector and have survival bases covered.
Just my thoughts. OH ! And always take physical delivery. Don't trust paper silver. There are still a lot of 'leasing' shennanigans going on.
Nam Vet