The Only Protagonist in the Pirate Game

Randomly selected real people pretend to be the system and trade with pirate characters. Through a series of tasks, you can find the time traveler in the pirate world and kill yourself to replace the traded object and switch between the two worlds at will. A game can only have one protagonist, is it a trader or a time traveler? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.