More than half of Zcash appear to be in "long term storage."
- In the transparent pool 30.4% of coins have not moved in more than a year
- 20% have not moved in more than 3 years.
- 30.8% are in the shielded pools
Either way you add these two numbers up (20% + 30.8% or 30.4% + 30.8%) you end up at more than half.