What are the safest non-stock investments to make during this period of uncertainty?

My portfolio is currently made up entirely of individual stocks and ETFs (mainly VOO). But with the way things are going, even index funds aren't that safe because the entire market is crashing with no end in sight. Are there any other safe investment options I should be looking at if I want to avoid all this turmoil? Should I be buying gold? Government bonds? Something else? I only have experience buying stocks so have no idea what other investments I should be making right now.