how is this even "similar"?!!
gold is a physical thing and the buying and storing it is hard, and the more of it you have the harder it will be to buy and store. and that storage is risky so you have to spend a lot of money securing it!!!
in comparison whether you have $10 worth of bitcoin or $100 million, it is equally easy to store. it will be harder to buy larger amounts but the storage is easy and it can be safest thing possible.
And not only that sending bitcoin all over the world is incredibly easy you just need a few clicks and you can send as much bitcoin as you want, but moving gold over different countries is something that is very difficult to do, maybe moving a few coins could be possible without bringing too much attention to yourself, but moving really large quantities of gold is bound to raise a lot of red flags, with bitcoin this is not really a problem, if you are the one travelling you can bring all your bitcoin with you in your computer, or you can use a hardware wallet, or a paper wallet, or an USB, or if you know your seed words you could memorize them and have nothing on you, compared to that gold is incredibly difficult to move.