I dont think paypal, perfectmoney or other digital payments are traditional payment methods. while bitcoin is still as same era with them? I think the traditional payment processor is cash.
traditional means something that is old . the digital payment listed above are not old but cash is . so cash is the only one that can be consider as a tradtional currency .
if cash I'm sure we will replace it in the future.
we are already in the future and cash is still the one that is being used even if we already have alot of payment methods out there . i have a feeling that cash wont be extinct because cash is the only one that can be easily used anytime or anywhere .