I really do not know? I have been struggling with that same question now for a little over a year. In the short run you have to stay liquid and wait for asset prices to correct downwards. Capital preservation. Then once they fall you have to selectively buy those assets - commodities, metals, energy, land - that you feel will give you the best protection against rising inflation and the debasing of money. Some here would recommend gold. I am not so sure?
In any case, the idea is to preserve wealth, not to get rich. For example, if stocks fall on average 50 percent - and yours only fall 25 percent - then relative to other investors your remaining capital is worth twice as much as theirs. That is a win.
So when I buy bunds I am not looking for yield, and I am not expecting them to protect me from inflation in the long run, but I am expecting them to protect me from a fall in the price of other financial assets. They are a safe haven.
Also, choosing your currency is very important. The euro has been a good place to park US dollars to protect against weakness there. But now with a slowing EU economy it looks like the euro will start to weaken as well. So now it may be time to move some of those euros over into Canadian dollars. The Loonie is not immune to problems in the USA - as three quarters of their exports go south - but Canada has by far better economic and budget fundamentals. It should hold up better in value than the US dollar in a financial crisis. Plus Canada has those physical commodities that are likely to benefit from inflation and or a recovery for the global economy.
I plan to use some spare money to play currencies until those stock fundamentals start to look more attractive again. But I may be kidding myself though as the real returns of the stock market over the past twenty years or so have really fooled us into thinking that double digit returns are normal and sustainable.
We may enter a decade or longer period of stagnating real returns not unlike having invested in the Nikkei over the past twenty odd years once their real estate bubble burst. The Nikkei is only around 13.000 now versus a high above 34.000 in 1989. Like gold, a simple buy and hold strategy since the late 80s was not a money-spinner or even a hedge against inflation. It was a wealth destroyer.
And that is the real lesson. There is no one asset that can guarantee positive results in all conditions. They all depend on the price or the entry level. So if all assets are too expensive right now, then it means by default that cash is undervalued.
Please do not construe my ramblings as investment advice. Caveat emptor. Cheers.
The organized state is a wonderful invention whereby everyone can live at someone else's expense.