During last two gold bull markets, gold appreciated 500% - 600%. Nobody knows the future, but if it repeats the 80s - 90s price pattern, gold price actually may have a long way to fall (and current rally might be a counter-trend rally) and may not bottom until 2030s.
Note long term bullish trend has not been fully formed/matured (judging by 10/20/30/40 M MA crossing).
Note this is an assumptive scenario and most likely it will not play out this way.