Raw land and silver can't go bankrupt or just disappear. Of course, either one bought at a high price, could drop precipitously in value. But you don't have that problem with silver at today's low prices. Raw land, like silver, is cheap to maintain. Raw land generally has low taxes and maintenance.
Silver requires low cost storage or no cost self-storage.
Both have no capital gains or profits tax due until they are sold. Either can be used for collateral. Parts of either can be sold separately. Both are conducive to long term, buy and hold philosophies. Either could be held for decades.