People who buy gold and central banks around the world do so to hedge against risks, combat inflation, and prevent currency devaluation. In other words, even if gold prices do not increase over 10 or 20 years, countless individuals and central banks will still buy gold.

If Bitcoin doesn't increase in value over 10 years, would you still buy it? Would you still hold it? There are many reasons given for buying Bitcoin, but ultimately there are only two: either to make money or to evade regulation through illegal gains.