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Before the surge in value , 1 or 0.5 bitcoin was a common ransom demand , with the idea that if the fee was low enough -- back then the ransom value worked out at a few hundred dollars -- this would encourage the victim to pay up .
 1 or 0.5 bitcoin: price
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:
 1 or 0.5 bitcoin: price