They will fight against e-currencies not because of protecting fiat currency but because of fighting anonymous payments.
Providing anonymous payments currently is illegal in pretty much all of the world; No matter how you design an e-currency, it has to be either (1) non-anonymous, (2) insignificantly small so that noone cares, or (3) temporary, since any payment service providing businesses will be closed down.
In essence, if you can send me money to be forwarded to person X; then that is heavily regulated, and unless I apply for special protection and licencing, I will (a) be completely liable for the transferred amount if the money "is criminal" - even if you/someone else stole it, and I "just" forwarded it; and (b) be fined for providing such services without the many mandatory consumer protections, such as having capital/bonds to guarantee full payment to everyone even if I go bankrupt.
Providing anonymous payments currently is illegal in pretty much all of the world; No matter how you design an e-currency, it has to be either (1) non-anonymous, (2) insignificantly small so that noone cares, or (3) temporary, since any payment service providing businesses will be closed down.
In essence, if you can send me money to be forwarded to person X; then that is heavily regulated, and unless I apply for special protection and licencing, I will (a) be completely liable for the transferred amount if the money "is criminal" - even if you/someone else stole it, and I "just" forwarded it; and (b) be fined for providing such services without the many mandatory consumer protections, such as having capital/bonds to guarantee full payment to everyone even if I go bankrupt.