If you're preparing for a post-society world, blowing all your money on heavy metals isn't going to help you. Nobody will give a shit about how much gold you have when all they want to do is kill you for your land and food.
Are you asking me personally what i'd prepare for?
If you look at the global economy then the chinese and the russians are stocking up on gold
At the same time they are telling their allies around the world to 'de-dollarise' which means that everyone should stop using the dollar as the worlds reserve currency
A bank has been created in china to handle foreign trade in non dollar currencies and many countries are now trading oil in non dollar currencies
The US in reply has got its client state Saudi Arabia to sell oil dirt cheap to try and put pressure on the russian economy (40% of their economy is oil and gas)
The whole crisis in ukraine and syria is really about access to pipelines of gas and oil. By grabbing the crimea russia was able to stymy the US attempt to control the pipelines in that region; in effect by supporting the facist coup in Ukraine the US forced the hands of the russians who quite reasonable see those ex USSR countries as its back yard...it would be like russia meddling in mexico!)
So oil is still where its at and oil has been traded for a long time in petro-dollars but the world has got sick of havign the US dollar as the worlds reserve currency because what the US has done with that advantage is use its ability to print money to basically create a massive military which it has used to create a US empire around the world with US military bases everywhere (they've encircled russis and china)
So people are fed up and ditching the dollar and their dollar reserves
Those reserves will then flow back to the US creating hyper-inflation. Hyper-inflation will wipe out peoples paper money savings overnight (just like weimar germany before WW2)
Paper money will become worthless. Peoples savings in the bank will be useless
Gold on the other hand will hold value
The rest of the world meanwhile will continue trading in gold. A lot of countries eg Iran are now trading oil for gold
Many countries eg germany and venzuala have asked for their gold back from the US who has been holding it since world war 2
You can still buy a suit and shoes today for the same amount of gold you could buy a toga and sandals for 2000 years ago. Gold holds its value
The big holder of gold in the west is the IMF who have created their own currency called 'special drawing rights' which might be pushed forward by the globalists when the dollar collapses as a replacement
Basically everytime there is a crisis whether it was the Great depression or the first or second world war the globalist bankers who control the IMF and world bank have used the crisis as a justification to centralise their power even further hence the creation of increasingly globalised infrastructure such as the IMF, the world bank, the league of nations and the United Nations
The next crisis will be no exception except this time they will seek to unify all western power under one government (a 'new world order')
This is why they have been undermining the US constitution and militarising the police. They are preparing for a breakdown of the economy and with it civil unrest and then to institute a new form of government; this attempt to destroy the US constitution will be very messy with a lot of civil unrest
The US paper money system is also a debt based system. Money is created through giving out loans because the banks who loan out the money only hold a fraction of the amount loaned out on deposit. this is called 'fractional reserve banking' and to the average person on the street would appear to be exactly what it is which is a giant swindle! (like a stage magic trick creating a rabbit out of a hat!)
With every dollar that is created interest is owed so as more money is printed the debt ceiling must go up. This is a ponzi scheme and at some point all ponzi schemes collapse under their own weight
To those in the know it is not a case of whether or not the US paper money system will collapse it is a question of when (but the US empire is not going away gracefully)