gold isn't a standard to measure the value of something else, because itself is based on fiat too, it's like we take any altcoin to measure bitcoin, it does not make much sense imho
also you should evaluate something against its competitor, not against what it is akin
yes i can see now the problems with dollars but do not agree we should not measure bitcoin against gold in some way. Bitcoin is in competition with gold albeit not in the same way as fiat. perhaps a better measure would be something like - comparing the gold to bitcoin buying and holding levels of all those people who are under 30? or something else that looks at uptake/use etc.
I realise there are lots of measurement issues but if bitcoin wants to be taken seriously (and get more users) it needs to be seen as an active participant in the market place and being 'measured'/'compared' in various ways is part of that. People get confidence from the new (here bitcoin) in part by seeing it in terms of/contrasted/compared to the old/familiar (here gold)
if you start to compare it to, too many currencies and commodities, it would start to rise some confusion, also gold isn't the main currency of any country, it is better to measure bitcoin with fiat, better if we choose the strongest ones
another problem is that for example right now the euro is getting weaker, and when i see the value of bitcoin against euro that is rising, one could think that bitcoin is rising, but in fact it isn't, it is just that euro is weaker and usd is rising, was exactly the case yesterday
i saw the price was 225 euro and still 251 in usd....