Gold is old fashioned and out.
In times we are traveling and mobile nomadic lifestyle, thinking if you want to carry 10 kg gold around. Go in a airplane

You will not pass the first security gate!
Bitcoins or other crypto on a SD-Card or a Hardware Wallet is much more 2018. You can store millions of $ worth in.
You can copy and backup in case it gets stolen.
You can do this with gold
