There are many commodities that people and companies hold to increase value in the future. An example are shoes.
There was a Nike Air Yeezy 2 ‘Red October’ sneaker that was sold for $5655 USD, and the original value of the shoe was only $250 USD.

People would have shoe collections that are of great investments just like gold and silver.
Another shoe that sold at a higher price would be the Nike Dunk SB which was bought for $200 USD and sold later for $8,750 USD. That would be a return of 4,275% investment return.
Although shoes are a commodity, it has some weaknesses such as the physical storage of the item. The person storing shoes has to make sure the shoes do not get damaged and also shoes take up space. There are also a physical exchange between the buyer and the seller of the shoe to take place.
If a transaction were to take place, the person selling the shoe would have to ship the shoe to the buyer’s place or actually meet each other to perform the transactions. This would take a lot of time.
The benefits of Bitcoin and cryptocurrencies are that there is no large storage room and that the physical transfer would all be digital or at least light weight with the prepaid cards.
Reference: Shoes used as a goldmine