GTA VI will feature story progression blocking - Rockstar came up with a restriction

In GTA VI, players may need a certain amount of money to continue the story, so they will have to engage in criminal activities between missions.

New information about the structure of the main missions has leaked online. If the characters do not have enough funds, the story progression will temporarily stop until the player accumulates the required amount.

This will encourage more active use of side criminal activities in Leonida. Instead of simply moving from one story mission to another, players will have to organize robberies, attack local businesses, and complete additional orders to pay for preparations for the next stages of the story.

Money will not just be an additional resource, but will become part of the plot.