I`ve seen this graphic posted on some other forum thread before.
There`s plenty of space for bitcoin to grow,but it`s wrong to compare it to gold.
Gold is used by the people for centuries.All the people without computer knowledge will trust gold,and believe me,most of the people in the world don`t have a PC,which means that they don`t know anyhting about btc and most likely they will never buy and use bitcoin.
indeed not everybody have a PC but , don't you think everybody will learn in the future ?
Look at right now,a twenty years ago or even less not many people understand about technologies and using letter to send a message,how about now ?
how about gold ? from my prespective it's only a shining item or jewelry,how about Bitcoin ?
the difference between both of them are great,from their ultility we can see who'll be the most usefull.
Bitcoin price can not be measured by chart or diagram precisely because it can fly to the moon at anytime moment or crash to the hell but it can be used a map for whole development in prices so we can calculate it all based on increasing,decreasing and social emotions
Gold is not only something shiny that people use, the reason gold was adopted all over the world as a currency is that gold has many characteristics that made it a good form of money, bitcoin has surpassed gold in that aspect which is why I think bitcoin is going to become a premium currency accepted all over the world, but we cannot deny the usefulness of gold.