This chart presents:

• 🟣 BTC volume of coins < 1m.
• 🟥 30-day net supply change < 1m.

These coins are usually quite transient, volatile, and represent the vast majority of day-to-day transaction activity.

Generally speaking, these 'hot coins' are very mobile, liquid, and change hands often. Thus, observing relative, macro, and long term changes in their balance is more instructive than day to day changes.