For example, to buy a house worth 200 thousand dollars, it will take about 5.5 kg of gold. At the same time, it will have to declare and pay for storage, the corresponding fees when crossing the border, etc. In addition, it will be necessary to pay for its verification for authenticity, protection and insurance. Not so long ago, fakes were very common, inside of which was tungsten. Additional costs will be the conversion of gold into currency, because not all are ready to accept as payment metal (at least not in full). In general, to pay for all additional costs will need to be about 1 kg of gold.
Bitcoin moves instantly. To use it, complex handling procedures are not needed. They can pay in a huge number of places and while it does not require conversion into money. To pay, you only need a password from your wallet, which you can write down or remember. For this, third parties are not needed, providing the whole process for which you have to pay separately. BTC is very easy to "transport" across the border, because it does not need special funds. Bitcoins are easy to access from anywhere where there is Internet. It will only be necessary to use some gadget.