If you want tangible diversification, a gold IRA helps funding in gold bullion or cash with purity specifications
https://objectstorage.us-ashburn-1.oraclecloud.com/n/id9kqfwnklno/b/financialupdates/o/GoldIRA/uncategorized/vanguard-and-precious-metals-iras-details-prospects.html
If you make a choice tangible diversification, a gold IRA allows investment in gold bullion or cash with purity necessities, controlled by a compliant custodian.