When you open the bubble map of a token (e.g. UNI), it shows the 250 top holders of this token as 250 bubbles (1), (2). So each bubble represents a current holder, and the larger the bubble, the more tokens they hold.
Some bubbles are hidden by default if they belong to contracts or exchanges since the focus is on connections between genuine holders, not contracts. You can still reveal them by clicking the eye button next to them
Note: Addresses with very high transaction volume (like hot wallets) are labeled as Supernodes. Some features are limited for these nodes to keep things running smoothly. For example, you can’t open the full transfer table for them, and even if two super nodes are connected, they won’t show links on the map to avoid heavy computations.
