Something about the infinity symbol says to me about going with the flow. I read somewhere about how the joker guy (in rider waite) is on solid ground, but his movements are mimicking that of the ocean behind him. So with negative cards around it, i'd see it more as juggling all these things, going with the flow of them, or maybe even feeling dizzy because of all of it (thinking about infinity can make your head spin for sure). What's important to note in cards that have symbols is how they are being used. He has infinity surrounding very physical things that don't last forever. Funny juxtaposition I think.
I also agree with LRichard, that the card points to cycles more so than the grand scheme of infinity. The ocean tide comes to the sand, than recedes back. The sun sets, then rises. This card isn't about things lasting forever. It's more about the patterns. And he's a joker, so he must have a pretty positive, lighthearted attitude about it all. What goes up, must come down, and this works to his advantage because he is a juggler.
