

I don’t think society across the whole planet will collapse, short of a nuclear war in which case gold won’t help one bit
Much more likely that certain areas will experience famine, war, disease, and reduced access to medicine.
Really the best bet is to be able to be mobile if an area has a significant decline you can move to where it’s better


Just look for a job and make sure you’ve got a visa. Third world countries have a lot more “informal economy” that isn’t taxed or handled with paperwork so it’s possible sometimes to just find a job without paperwork or anything, but that won’t help you get a permanent visa.
Ideally, you get a visa that allows work, show you’re working, and then the visa gets upgraded to a permanent resident visa. This varies a lot from country to country. If you’ve got a job, some countries are pretty happy to have you adding to their local economy and will extend you a visa. If you’ve got a remote job that might go even faster.
Alternatively if you’re not skilled in any way, you apply to a super cheap college and apply for a student visa, that’ll buy you a few years while you’re getting skilled in something that country needs. Studying to become a doctor, lawyer, or STEM goes a long way. One of these probably is in demand there, figure out which one and take a crack at it. Hard, for sure, but a pretty solid way to build something long term. Of course if you don’t know the language that will be harder, but colleges generally have language classes too, so that could be the first classes you take.
There’s also teaching English, it’s generally not too hard to find work as a tutor or English teacher, I saw the other day like there’s only one English teacher for every 500 open positions. So that’s a possibility too.
Just generally try to participate in their economy. Try to make local friends and assimilate. Think about what first generation immigrants do: find a steady job or bust ass studying tech or medicine.