My personal "retirement" plan is to live with my children when I become too old to fend for myself. Retirement and living alone as a grandpa didn't exist 100 years ago, and its going to cease to exist after the collapse. I would personally try to convince your parents to move in with you, and if space is not available, use their retirement funds to buy a new place or expand your present one to accommodate them . You just need to assume that this country will fall to and stay at 3rd world levels (or possibly below) for at least a decade. In the 3rd world, parents live with their children - sometimes all of them, and their families, because its the parents that own the home.
Wealth can only be "preserved" at this point in hard assets - and the value of those assets is going to change dramatically. Your parents will NOT live off their accumulated wealth, for all forms of wealth are as risk now, and after the collapse, without the meaningful rule of law to protect your property, the things you own are the things you can protect. Real Estate - both demographically and economically is going to become cheap- in large part because no one will be able to evict squatters - there will be too many and not enough resources to remove them .. and Socialist feel "housing is a right" so rentals are not likely to be lucrative. There will be no credit, so buying and selling Real Estate will be near impossible. Meanwhile, toothpaste and toothbrushes will probably become high dollar items, as they are in other 3rd world nations. But a Warehouse full of toothbrushes is only valuable so long as you can protect the warehouse. A toothbrush factory then? No , because businesses and risk takers will be penalized, and directive 10-289 will be in effect. If your parents have the wealth to pay to play, then yeah, you can become a crony and do well. If not, you efforts need to be concentrated elsewhere
It will probably be difficult to convince them, but your parents must be made to understand that "rich" in the 3rd world means being able to provide for your basic needs. Fuel, power, food, water, clothes. Living as you do now is "preservation" of your wealth
My "retirement" plan is to rely on my children to take care of me in my old age when I can no longer fend for myself, and quite frankly that needs to be your parent's plan as well. Their wealth will be far better "preserved" buying a place (or expanding a current) that would allow them to live with you (and possibly your siblings) in comfort. Its is better spent on a PV Solar system that keeps your fridge/freezer running and your food cold when the local power utility goes out ( which it often does in the 3rd world) It is better spent on land with a well and septic that can be farmed and grazed to provide food, and on a greenhouse to provide aquaponics for fish and a food supply not exposed to the elements. It is better spent on dried food for when other sources fail, and a water filter to ensure water is always available. Its better spent on bullets, guns, and armor (knife and bullet resistant) for that trips you need to make for supplies and for protection while working your land. You need useful things that will add to your quality of life. Tools. Building Materials. Tractors. An Alcohol Still. Beer making supplies. A home Bio Diesel plant (only $8000) The more of your basic needs you can provide for without resorting to trade, the "wealthier" you will be. Any extra goods produced for basic needs will be easily traded to provide cash . A gallon of diesel for a toothbrush is a much better transaction if you can make the diesel yourself. There will be all sorts of niches in the "new economy" - but the point is the economy, and the value of the products produced within, will be new, and pretty much unrelated to the old one.
Gold and silver will be unreliable sources of wealth. They are speculative plays. If gold or silver become accepted and currency, the buying power of those items will appreciate dramatically. However if SDRs or other "new money" are introduced by TPTB, expect gold and silver to be confiscated or at least made illegal for trade ( silver is used industrially, so its the more difficult to do this with) forcing you to the black market where it may be worth less in purchasing power than it is now. Yes, you should have some, but it will probably only be really useful for barter in the months following the collapse. Stocks will follow the inflation for a while, but they will not make you money ( beyond the fake dollars you need to pay off your house loan - loans are a form of shorting the dollar, and its probably the best speculative play out there- providing you continue to have income that paces inflation)
Your parents need to understand that they will not be spending their golden years traveling the world, seeing the wonders of nature, eating at 4 star restaurants and sipping $100 bottles of wine, or sitting on white sand beaches dipping their toes in the water with colorful drinks topped with little umbrellas. They will spend it helping to do chores around the house with family, and playing games with grandchildren. Life isn't fair, but it is what it is. Adapt or don't.