If you live in America and just want to protect your buying power against inflation: buy I-bonds. You cannot sell them for a year and can only buy 10k per year.

If you live in America and just want to protect your buying power against inflation: buy I-bonds. You cannot sell them for a year and can only buy 10k per year. But they pay interest roughly the same than inflation. For us plebs from the rest of the world without access to I-bonds I have no idea.