Bitcoin will replace gold as global current.
bitcoin is much convenient to save, transfer and split.
I wouldn't consider gold to be a worldwide currency as I cannot really use gold down the road on the corner store... It still has value and is good for storing money but I can't use it everywhere whereas bitcoin I (sort of) can.
If you are in a place like India, gold can be easily converted to fiat.
You will have to really try hard to convert bitcoins to fiat.
Depends on the country I guess. Ultimately gold has the same bottleneck as bitcoin at present. If I tried to exchange it for goods and services, I can't think of a single person or place who would. I have to go to a market or dealer who would buy it off me. They can be shut down.
If a government wanted to do a 1933 all over again then I'm stuck with my shiny stuff or I have to hand it over. Eventually bitcoin won't have that problem if enough people accept it directly.
Gold has been in a bear market for 3 1/2 years. I don't think most of you could survive a 3 1/2 year BTC downturn. It might take another 12 months to get down to $100 and then it might trade sideways for another year.
And gold's last all time high adjusted for inflation was 35 years ago. I'd be cutting my BTC losses if it took that long again, or I'd already be dead most likely.