I know you are, but what am I?
You cherry pick one short period which fits your theory and ignore the rest.
How about something a little more recent?
Under a gold standard, we'd have had severe deflation (over 30%) from January until mid-May and severe inflation (over 20%) from mid-May until mid-June. Yeah, that sounds more stable than an unbacked dollar. LOL!
You show me a chart with the price of gold up one hundred dollars an ounce over a few months and you use that to indict gold for instability? You are becoming very tiresome, go and play with the other children.