This is confusing. Someone on Reddit told me that the cover is good, with money stained in blood, means how dirty are the tricks the merchant is going to do.
Meaningful covers are good, but there's also the fact that your cover is essentially your advertising space here so it should be something that invites people to read, while still managing to convey what your story is about. To be fair, this isn't a hard rule and many stories manage, but in the end, success hinges on how many people click.
You can entice in various ways, big booba, pretty little girls, beastlike creatures, even a shitpost, but it has to invite clicks. Clicks can be gained by curiosity, by sheer desire, even by bewilderment, but clicks, clicks, clicks.