I think the point is that if your money is in funds, which are likely to have 'negative return' over the short-to-medium term (e.g. equity funds), then surely the thing to do is to move it to funds which are less likely to have a 'negative return' (e.g. commodity or EUR funds).
Of course, in long term investing, the aim is to use time to average out the peaks and the troughs. In times of low price, you get more for your money; In times of rising prices, you gain high returns.
Whether you choose to trade the market, or simply ride it is up to you. However, trading brings with it risks, because if you time it wrongly you can worsen your position substantially, but at the same time, there are potentially large gains if you step out of a falling market, into a rising one.