Its fairly impossible to advise anyone properly via a thread as who knows what your situation is, or the bias you should target going forward. Everyone should have 10% in a gold fund imo, I consider that medium risk and likely good performance relative to that risk. I imagine the majority reject that idea and are not even close, not even 1% involved with gold across a portfolio. FTSE100 fund or similar wouldnt do it afaik, by the time its a popular idea it'll have become expensive.
When stocks (indexes) gained a large amount in 2019 they became more expensive, when gold stocks (indexes) gained a large amount in 2019 they became cheaper because the commodity they mine keeps rising which via margin expansion is a giant benefit to a balance sheet. Buying into a rising price where the company is growing just as fast is ideal, I think the whole sector is being missed for opportunity especially if young and able to accept the volatility/risk that comes with commodities.