Ouch....
This is the #Bitcoin 10yr HODL wave.
These stair steps are coins that just had their 10th Birthday.
In all likelihood, these coins are lost forever. Probably lost on some OGs hard drive that went in the bin.
81.9k $BTC = $4.1B
61.0k $BTC = $3.1B
48.2k $BTC = $2.4B