Xapo guy said in the conference that Bitcoin would replace gold as the standard, but that it would not replace national fiat currencies. Pretty wild but it was well reasoned. We'll see.
When you want to send 'wealth' to somebody else, the easiest and best option will be BTC.
To send wealth BTC is efficient and fast but to do this you need someone (a trader) who is buying the BTC for the wealth you want to send, in the place you want to have the wealth.
Because of the nature of volatility it is not possible to simply send BTC. You need someone accepting a forward contract paying for BTC what you wish for.
Buying BTC for 100 wealth
making a forward agreement with a trader located close to the place the person lives you want to send the 100 wealth.
Then the trader buys the BTC for 100 wealth from the person you have sent the BTC to.
There might occur a fee.
Nowadays it works this way:
Person A tells his/her bank A to transfer 100EUR in USD to person B which is a customer at bank B.
Bank A tells person A how many USD person B will receive. Costs are: forward contract fee, transaction fee, fee for bank A, fee for Bank B, fee for the clearing company.
Person B receives something like 90EUR in USD.
to make this work, you simply need enough trader or ripple gateways. To get enough trader you have to setup exchanges - this also will lead to an efficient pricing, but only if the exchanges are big enough.
One big Exchange based in a banking network where transactions are free of charge will be enough. Those exchanges have to be connected with each other and need to have a clearing process.
However, to connect the exchanges they have to trust each other and this is only happening if these exchanges are regulated by banking authorities.
A solution would be one big exchange - accepted by every country and its authorities - with an internal clearing process for the real bank accounts. In my opinion it is possible to achieve this, but to do so you need reliable people instead of kids setting up BTC exchanges. People who have deep knowledge about the financial industry, compliance, and banking cyber security. Oh and these people have to be interested in BTC of course
tl;dl: BTC still needs a middleman to be efficient in sending a specific amount of wealth to another person.