I can't help mention a few scenarios I think could happen, should "collapse" occur - I think most of the following phenomena are unavoidable:
1) regional wealth transfer instead of everyone collapsing:
- the entire world will not collapse, but "the flag bearers" and everyone tied to them/some countries' economies will smash the ground, but many will survive, some almost "unharmed" - meaning that Brunei, Uganda and Belarus are not that much exposed as the USA, UK, Germany, France, Australia and Japan
- I can imagine the "collapse of the West", but most likely other countries will gain strength and become even stronger (I'm thinking of Asian, Latin American, African countries...)
- "contained" economies like New Zealand and Australia are also physically so isolated that they will most likely feel a dip and then things could get back to normal (due to the vast resources they have)
- not everyone will collapse, many countries will thrive, because a wealth transfer will occur, even between regions (from one to the other)
- wealth transfer also means running from the Dollar and the Euro: other currencies will rise (remember the rise of the Swiss Franc back in '08?)
- it would be interesting to watch the economies that are currently trying to prevent/escape the collapse: including the ones buying gold, escaping the dollar, but perhaps even Brexit can be regarded as and escape from the EU ("Escape from New York")
2) some for of gold standard or, gold-backed currency:
- it might be a limited gold standard or, even private gold-backed assets (I can't see why someone would launch gold-backed private pension funds?)
- so, invest!
3) the multipolar world:
- I think the West is losing ground, but this is happening very slowly (it's inefficient in everything: economically, the EU, NATO, everything...): it's not only in decline economically, but also socially and militarily
- nevertheless, the multipolar world will mean a fragmentation of the world into larger regional "blocks", as the US/EU/NATO loses ground (due to this I can imagine that sadly, regional dictatorships will arise - I'm pretty sure that major regional players will play more serious roles: Germany, Turkey, Russia, Brazil, Australia, Iran, India...)
4) rural areas, small cities are better:
- the aggressive urbanization has made big city life horrible to bear (just take a trip to Bangkok and you'll understand... or Mexico City or Los Angeles), so you'll be much better off, if you buy yourself a nice vacation home in a rural area or, a house in a small town somewhere
- it's also safe in small towns
- costs are more reduced, reason why all over Europe, people are moving into areas around the big cities (people are moving out), while the masses of migrants are coming in (Barcelona, Vienna, Frankfurt, London, Berlin)