Sorry to say this, but making money from assets is very difficult.
I am trying to sell 166 dual reality puzzle assets for just $1.25 (50% off), but can't even sell one pack. I am offering Founder status as an early supporter, but it has not helped. You need a larger asset pack including the asset. To sell just one 289 B coin for $3 will never sell. I would suggest making a itch.io page, and start it off as free. Then, build a asset pack around it, and improve the asset quality. Only then will you sell
I have this asset pack: Pixel Core III: Fractured Realms, and it still can't sell anything...