Offer your thoughts or opinion on the input financial query or topic using your financial background.

Are you preparing for a possible dollar (USD) collapse? (How?)
Depends what kind of expenses you intend to use this money for. If you plan to buy housing in the future (eg you're saving a deposit), then you need to ensure that the value doesn't deteriorate relative to the value of the housing you are likely to buy - so you could buy a Residential REIT, or buy some investment property. If you expect to use this money for food, then you should buy suitable assets (eg Wheat futures, etc). Link the current asset to the future expense, and you will be fine. If you buy Gold, then you are making a bet that Gold will retain its value compared to the thing you want to purchase in future. It doesn't matter what the price of Gold does in $US.