I posted a chart of the last 12 months of a company that I know people have sold with the intention of buying back cheaper as you have said you would with gold. It doesn't always work.
Look at the chart. Do you think it would be better to have simply sat on the beach or do you think your trading skills are so great that you could pick entry/exit points on that stock? If you can trade that well you should not be posting on a property forum. The world is your oyster.
Of course it doesn't always work. Who ever knows with 100% accuracy what will happen? I should also say that those people that sold may still get there chance to buy back cheaper, but they may not. Thats the risks of the sharemarket.
In the last 10 years I've traded over 1000 parcels of shares. Not heaps, I know. I never regret taking a profit. Sometimes I get to buy back cheaper , sometimes I don't, it doesn't bother me, there is always somewhere else to invest.
My paper gold for example I have sold and bought back around 20 times, often I had sellers remorse, but it has never lasted long as I;ve always been able to buy back cheaper (except twice ).
Gold is one of the easier ones to trade as every spike so far has had a pullback.
I've yet to time the exact top, and like every other time, this sale still leaves me worried that maybe it was too early, but I've been lucky so far, and tbh, if it hits $1300 before the pullback and I decide to buy back at $1260, I'm still way in front.