27 Then Peter said to Him, "Behold, we have left everything and followed You; what then will there be for us?" 28 And Jesus said to them, "Truly I say to you, that you who have followed Me, in the regeneration when the Son of Man will sit on His glorious throne, you also shall sit upon twelve thrones, judging the twelve tribes of Israel. 29 "And everyone who has left houses or brothers or sisters or father or mother or children or farms for My name's sake will receive many times as much, and will inherit eternal life. 30 "But many who are first will be last; and the last, first.
Peter was concerned about recovery from the sacrifices the disciples had made to follow Jesus. “We have left everything to follow You so what do we get?” His sacrifice didn’t go very deep, he was still trying to guard his own stuff. Jesus assured him that there would be no loss but in fact a great gain plus eternal life. However, there would still be some promotions and demotions as motives are sorted out.
No one has ever given up anything for Jesus that won’t be amply replaced along with the positional reward of reigning with Christ.