In its filing, Tesla writes that earlier this year it “updated [its] investment policy to provide [it] with more flexibility to further diversify and maximize returns on [its] cash that is not required to maintain adequate operating liquidity,” adding that it has the option of putting cash into “certain alternative reserve assets” that include “digital assets, gold bullion, gold exchange-traded funds and other assets as specified in the future.”
Considering Gold Bullion, Gold ETF's

https://twitter.com/FirstSquawk/status/1358760754845913092
Tesla SEC Filing:
https://www.sec.gov/ix?doc=/Archives/edgar/data/1318605/000156459021004599/tsla-10k_20201231.htm