Just to add to David's comment, bullion can be held and traded conveniently through Bullionvault which provides allocated and audited bullion held in a choice of locations around the world. This is 'physical' gold but able to be traded in small quantities electronically around the clock. I have used the service for a number of years but obviously do your own due diligence.

David Fuller's view

Thank you.  This is a welcome addition to what I wrote yesterday.