It’s interesting that you’re showing BTC vs. gold in ounces. For me, this comparison makes much more sense.
Comparing BTC to a weak currency like the USD always looks favorable, of course. Even the Swiss franc—although it, too, is heavy manipulated by the SNB—would be a better benchmark than the dollar.
For everyday use, BTC/USD might be practical, but if you really want to gauge Bitcoin’s strength, you should compare it to something with real stability and value.