Still interpolation between two points in your graph makes no sense since they are discrete (i.e. there is no 'in between' two movies). A line graph always interpolates between the datapoints suggesting there are continuous values in between the datapoints, so the usage here does not make much sense. You can still see the decrease in box office success in a bar chart.

If you wanted to show the decrease in box office earnings over time then you could just plot the box office earnings of A24 over time and maybe colorize the contributions of each movie or something like that, if that data is available of course.