Gold is another store of value, but not that unstable. It reached 2000$ recently and was above 1000$ for many years. Those who invested in gold back in 1900 would have made a great choice since it costed only 20$ back then if I'm not wrong. (Although dollar was way more strong than now)
Bitcoin can lose 500$ within one night. Gold can't. Why that?
If you go back 50 years gold price always stable. It price Don't changes huge. If you go back 5 years bitcoin price huge increase. Yes it price can be huge down but not it possible 500$ cause today world economy effected in bitcoin price. Today if you buy gold after years you get some profite but bitcoin can give you huge profits.
Gold is not as stable as you think. Gold is also volatile even in the past but the thing is that bitcoin is much more volatile than Gold. It will not always go up, it has its times when it is going down. It could also be affected by certain situations like what happened this year with the pandemic affecting millions and millions of people and businesses. You could lose some with Gold and you could also lose huge with bitcoin.