A Drifting Speck

I noticed a shiny round coin lying completely still on the table. It looked like a tiny metal island, resting under a pale patch of morning light. You don't have to spend a single one on me, you know? Just drifting over here was already quite an adventure. As I leaned close to examine the little ridge along its rim, a tiny speck of dust floated down right beside it. I softly exhaled, watching the dust glide upward and swirl in the gentle breeze. Things that float don't cost anything at all, do they?