662
However , by the time those behind WannaCry had withdrawn funds from the associated Bitcoin wallets -- a full three months after the attack -- it meant the 338 payments victims had made were worth around $ 140,000 , which was an increase in value of just under $ 50,000 compared to when the majority of payments were made .
 Bitcoin wallets: payment method
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 Bitcoin wallets: payment method