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No one knows that's the point. When investing in Bitcoin or any volatile asset, one should understand that there is no guarantee that they are going to get a certain percentage in returns after a specific period because the price is unstable and unpredictable, it's priced above $70k today,
...-snip-Guarantee or certainty does not know, but with price volatility there is its own pleasure and for me about price volatility that is the pleasure if the investment is carried out in the long run.
Gold investment volatility may be low, but in expecting price returns are very slow. Bitcoin with high price volatility, although it cannot guarantee, has proven to be faster and greater than gold investment or other stable investment.