[jerguismi]

> it just adds another issue to negotiate in every deal.

Not really. We have this thing called technology, which allows people to automate things. And it is very much possible to automate almost everything related to currencies and payments.

If merchant wants to hold currency A, but can gain customers from currencies B, C, D, F, he can just implement some payment processor which does all the legwork for him with 1% fee.

> I don't see any major harm but I don't see any benefit either.

It is pretty difficult to see benefit why someone would want to use for example dollars compared to euros. It is mostly where you happen to live and to what currency you are used to. But I would bet my ass that people would after all like to decide themselves what currency to use, instead of someone else to force them to use specific currency (however still most people would probably just use the currency they are used to).

[josephlord]

For instant one off transactions it is simple. For delayed (when order is delivered) or repeated/recurring (salary, installments, ongoing fees) to cancel the currency risk you need to also have futures or options and deal with counterparty risks and have the reverse risk if the order is cancelled and you still have the matching future.

It gets really complicated quickly and for most people best just to get the one most aligned with their costs/spending and then they can enter currency speculation if they want to.