Good question Alex. Best way to protect yourself against inflation, stock market and etc has been throuthout history gold. But buying physical gold is expensive, hard and difficult to storage. Then we have companies such as BullionVault or ETFs that promise backed gold.
Found an old news letter from BullionVault, which describe tje reason of gold storage pretty good. 
”Why does BullionVault make sure you get outright physical ownership of gold? After all, it would be so much easier to offer you a gold account.
The reason is risk of default. One of the patterns which recurs throughout history is that growing financial sophistication leads to widespread expansion of credit and exposure to default, and few people successfully avoid it when it matters.
Banks, pension savings, mortgage guarantors and all the major financial institutions on which we depend are now tied up in a web of undelivered assets. A is the registered owner of a bond payable by B, the principal on which has been credit-swapped out to C. The terms are controlled by a deed drafted by an investment bank D, which itself receives the interest, which has been aggregated with 30 others and sold notionally to E. E is foreign, and flattens the FX risk with a bank F, who sells and rolls a future on his long currency book, which is bought by another bank for an assured profit by running the position against a higher yield bond bought from a junk-status borrowing customer, which has been insured against the risk of default with G, a major insurer, who happens also to be A.
These are the styles of relationship which dominate the world in which ordinary peoples’ savings are bound up, and they are profitable in the short term. This is why financial rather than commercial companies increasingly dominate the list of the top companies in America and Europe. They find it easier to make profits by providing credit and assuming eventual repayment, rather than by actually demanding settlement; a habit which could put off no end of potential customers.
All our common savings products are bound up in these webs. At BullionVault we do not know when and where these webs will break, and, with the greatest possible respect, we don’t think you do either. But it is so certain that they will break, and at an unexpected place and time, that we believe every forward thinking person with a respectable private reserve would do well to opt out with at least part of their savings.
A purchase of gold is a good way to do this.
But gold accounts, indexes, spread bets, and futures all fail to extricate the buyer from the web of dependencies, because they are based on undelivered gold. The only way to opt out of the web is to own physical property outright.”