How Am I Supposed to Have Money to Stockpile Supplies?

[Transmigration, System, Feel-Good Power Fantasy, Apocalypse]

College student Ye Shi transmigrates to a world centered around the apocalypse and awakens a System. The System tells him the apocalypse will begin in three days and urges him to prepare supplies, but it won't give him any money. In that case, there's only one thing to do... rob people!