Cointime price
a floor built from how long coins sat still
A floor-like estimate of what bitcoin is worth, built from how long coins had been sitting still before they moved and at what price they moved. Price touching it has coincided with the bottom of every cycle so far; price far above it means the market is stretched.
DefinitionSum over all history of (price x coin-days destroyed), divided by cumulative coin-days stored. Also called the Blummer price. The ARK paper states the formula in coinblocks; this is the coin-days basis, which is what every public implementation publishes.
LimitProvisional, and it says so because it is not settled: our two source papers disagree with each other about cointime cap by 4.8% over a single day, in a measure that barely moves. The shape is usable, the exact level is not. In euro this is the global market's cost basis expressed in euro, not what European holders paid; before 2013 the euro price is the dollar price converted at the ECB rate.