Nobody uses BTC like this for anything (pay or purchase). At the time of payment you would convert your fiat value into BTC and make your payment, the other side is free to keep the BTC to convert it instantly into their local fiat.

I see this argument a lot. The issue I have with this is that you are merely trading the headaches of international wire transfer with the headache of converting BTC<->fiat. Basically, instead of dealing with a bank, you're dealing with Coinbase.

No, this service would useful if I can get paid in Bitcoin, and pay for a majority of my expenses in Bitcoin, without having to convert to fiat at any point. Unfortunately, the Bitcoin ecosystem is nowhere near this sophisticated yet.

I suppose that would be true if exchanging BTC to local fiat was a "headache" for me. In my country and with my experience it hasn't been a headache at all between the local exchanges I can walk up in person or online.

Dealing with banks is less of a headache for me than dealing with a Bitcoin exchange.

Have you ever tried to pay someone in another country?

i think you mean 100 BTC