> If you're using bitcoin for international money transfers you're using exchanges on either end of the transaction to convert to bitcoin and back.
That is not a given.
> You may as well use an International money transfer service like Transferwise (which essentially is similar to a bitcoin exchange but currency to currency), that performs the same function without the bitcoin in the middle... Transaction costs will be lower and it will be faster.
I could ask the same question: If Transferwise exists, why do we still have international bank wires? It's a different financial instrument with different properties. Transferwise is some company from Finland that you need to register with to send a limited amount of money to a limited amount of countries. Maybe that's better than Bitcoin under some circumstances, but it's a different thing.