Good questions; those are the traditional currencies measured against the Dollar. I agree it should be updated.

The DXY in 1971 was over 100, but not too far above it. Gold was $35 an ounce. The DXY is lower today and gold is much higher. Gold performs well over time as money - it is not an investment. What you can buy with one ounce of gold today is also similar to what you could have purchased with one ounce of gold in the Roman Empire, that's how well it does through time. I'll leave bitcoin aside as it's very new relative to the DXY. Gold has routed the DXY in that the DXY in 1971 was higher than today while gold today is higher than it was in 1971; one could argue they could earn interest on a savings' account, and that's true except they would be missing on the possible opportunities of pair trading currencies. When looking at money being money, gold is one of the best over time. No one allocates 100% of their wealth to money - most wealth is an investment and thus only a small portion of wealth should be in money.

I'll post someday about various ways of measuring currency values, along with my preferred method - that's a much longer answer!