I'd like to know what to do with ~10 000 euros, right now. Where should I put it so it doesn't lose its value and keep a bit with inflation ? edit for a bit of context: Western Europe, renting, unlikely to be able to buy/invest into a house/flat, looking at gold ingots, not the nerve for crypto.
I would just hold it - I have sold most of my index fund holdings in the past 6-9 months and been just holding cash. I don't think stocks have reached the bottom yet, so holding cash at 0% return is still better than negative returns from stocks. Right now, it's about not taking losses. I also don't see the market and economy rebounding quickly after reaching bottom - they will stay flat for a while IMHO
holding stocks as they go down in price does not necessarily matter. It only matters at time of sale. Selling an index (or a particular stock or set of stocks) as they go down only to buy them again later is not the right strategy... you're incurring transaction costs at the very least and the fact that you cannot time the market means you'll probably lose out even further.
Hold the index, unless you need the cash flow or forecast that you need more buffer for flexibility and don't want, in the short term, to be penalized for volatile stock prices (e.g. in case you need to sell to service some cash needs).
And if you have the cash, continue to buy the index on the way down. If your view is that the market, over the long term, is the best generator of wealth, then continuing to buy into it is the more rational strategy.
Inaction is sometimes the best action. There are more ways to be dead than being alive.