Woofun AI data shows that Bitcoin's Herfindahl-Hirschman Index (HHI) reached 1116.1 as of July 21, surpassing 89.6% of historical observations over the past decade. The index rose 5.5% in the last 90 days and 10.1% over the past 180 days.

The increase is driven by coins held for 6 to 12 months, which grew from 12.9% to 19.3% within 90 days, while the 3 to 6-month share dropped from 14.3% to 6.3%. Long-term holders account for 17.7% of supply. Currently, 81.6% of Bitcoin has not moved for over six months, and 62.3% has remained idle for more than a year.