Part of the CustodyStress archive of observed Bitcoin custody incidents
Device Discarded — Early Bitcoin (2009–2013)
Device discarded cases from Early Bitcoin (2009–2013). The James Howells era — hardware disposed of before backup standards existed, containing keys to wallets that appreciated enormously in value.
31 cases in this intersection. 75% of determinate cases resulted in a blocked outcome and 25% in access survived. The most common recovery path is no path available.
Archive analysis — 31 cases
Outcomes
75% of determinate cases resulted in blocked access — 6 percentage points above the archive-wide average of 69%. 25% resulted in recovered access — above the archive average.
Documentation coverage
61% of cases have indeterminate outcomes — higher than the archive average of 43%.
Custody type
97% of cases involved software wallet, followed by exchange custody at 3%.
Primary stress condition
65% of cases involve device loss. Seed phrase unavailable accounts for a further 23%.
Documentation
32% of cases had present and interpretable documentation — yet still produced a blocked or constrained outcome.
Scale
19% of cases involved large or very large holdings (10+ BTC).
9
Blocked
0
Constrained
3
Survived
19
Indeterminate
75% of determinate cases resulted in blocked or constrained access.
31 observed cases
Blocked
9 (29%)
Survived
3 (10%)
Indeterminate
19 (61%)
Armory Wallet Lost via VirtualBox Snapshot Rollback—Binary Recovery Attempt
Software wallet
In October 2013, a BitcoinTalk user known as HowlingMad lost access to 6.59159344 BTC stored in Armory, a then-leading Bitcoin wallet application running on Win
Encrypted Wallet Recovery After Accidental Partition Deletion (2013)
Software wallet
On July 17, 2013, a Bitcoin holder identified as Praxis posted to a cryptocurrency forum after losing access to multiple wallet files stored in hidden Linux dir
1,000 BTC Permanently Lost After Brother Deletes wallet.dat From Shared Dropbox Folder
Software wallet
In 2017, Hacker News user illumin8 disclosed a permanent loss of 1,000 BTC resulting from a wallet file deletion in a shared Dropbox folder. The Bitcoin wallet
James Howell's 8,000 Bitcoin Hard Drive: Landfill Loss Without Backup
Software wallet
James Howell, a computer professional based in Wales, accumulated approximately 8,000 Bitcoin during the early mining era through a combination of mining and ac
Multibit Wallet Lost After Mac Reformat Without Backup
Software wallet
In November 2013, a BitcoinTalk user identified as funkonaut posted about losing access to their Bitcoin holdings following a critical self-inflicted data loss
Bitcoin-Qt Wallet Loss: Executable Backup Without Private Key File (2013)
Software wallet
TheD1ceMan, a forum user, experienced an irrecoverable loss of approximately 1.8 BTC (valued at $2,300–$2,700 USD at May 2013 market prices) due to a critical m
James Howells and the Landfill Bitcoin: Device Lost, Recovery Legally Blocked
Software wallet
James Howells, a UK resident, discarded a hard drive containing an encrypted Bitcoin wallet during a routine office clearance in 2013. The device was disposed o
Australian Miner Loses Early Bitcoin When Sole USB Backup Drive Fails Irrecoverably
Software wallet
Alex, an Australian Bitcoin miner based in Melbourne, mined Bitcoin around 2010 when mining was still a hobbyist activity with negligible monetary value. Unlike
Maxime: Hard Drive Corruption Destroyed Only Copy of Seed Phrase
Software wallet
Maxime, a Canadian journalist, began mining Bitcoin during the 2012–2013 period when the technology represented an emerging alternative financial system. He suc
Multibit Wallet Recovered From Formatted Hard Drive After 5 Years
Software wallet
In 2013, a Bitcoin holder stored funds in a Multibit wallet on a work desktop computer. The hard drive was subsequently formatted, and the user assumed the Bitc
Mac Formatted Without Backup: wallet.dat Recovery Attempt (2012)
Software wallet
On July 5, 2012, forum user Mashrock reported formatting a Mac computer running OS X 10.7 and subsequently losing access to Bitcoin stored in a wallet.dat file.
Private Key Accessible but Wallet Balance Unrecoverable: bread45's 2011 Mt.Gox Withdrawal
Software wallet
In June 2011, bread45 purchased Bitcoin on Mt.Gox and transferred coins to Bitcoin-QT desktop wallet software for self-custody. In 2012, the user accidentally d
Scattered Wallet Fragments: Passphrase Known, Decryption Blocked by Checksum Failure
Software wallet
Between 2011 and 2012, a user mined Bitcoin using Bitcoin-QT on a personal computer. Lacking technical knowledge about the software and wallet format, he delete
Unauthorized Drive Format and Corrupted Wallet File Recovery Failure (2011)
Software wallet
On September 17, 2011, a Bitcoin holder identified as cablepair discovered that an office network administrator had reformatted the hard drive of a shared offic
Formatted Computer, Lost Wallet.dat Access—Recovered via Time Machine Backup
Software wallet
On July 3, 2011, forum user Omega0255 reported a critical custody error with a 1 BTC mining pool payment. The user had formatted their SSD drive using a secure
Corrupted wallet.dat Recovery After Hard Drive Failure: 2011 Case Study
Software wallet
In May 2011, forum user zrataj (John) experienced a critical storage failure when his hard drive crashed, destroying both his primary wallet.dat file and the ba
Corrupted wallet.dat from 2011 Hard Drive — Fire Damage and Data Loss
Software wallet
In January 2021, a forum user known as 'french' reported discovering a wallet.dat file on a hard drive that had experienced both partial data erasure and fire d
Corrupted ext3 Hard Drive & Fragmented wallet.dat: HEX-Level Recovery Attempt (2011)
Software wallet
In June 2011, a Bitcoin holder identified as TurboIan reported catastrophic custody failure on a 65 GB ext3-formatted Linux hard drive. The drive suffered files
Device discarded — software wallet (2011)
Software wallet
In 2011, when Bitcoin mining was still largely a hobbyist pursuit, the user identified as 'bubbabojangles' mined 103 BTC using standard desktop equipment. At th
80 BTC Recovery After Hard Drive Format: Pywallet Raw Data Reconstruction
Software wallet
In December 2011, a BitcoinTalk user's friend experienced critical wallet inaccessibility when his computer crashed. The friend brought the machine to a technic
Fragmented Wallet.dat Recovery: Disk Image Mining Loss Without Backup
Software wallet
In 2011–2012, callerman used Bitcoin-QT to mine Bitcoin on a personal computer with limited technical knowledge of cryptocurrency infrastructure. Facing disk sp
1,000+ BTC from 2010: Lost USB Drive, Corrupted Hardware, Incomplete Seed Recovery
Software wallet
In 2010, theunionjack purchased over 1,000 Bitcoin at a fraction of a cent by creating two PGP keys using GPG4Win/Kleopatra and importing them into what he beli
50btc Pool Mining Loss: 2–3 BTC Trapped in Defunct Pool, Virtual Disk Recovery Failed
Exchange custody
In 2010, a user identified as Zagal downloaded and ran 50miner, a mining client for the 50btc pool, on his personal computer for approximately one week. During
10,000 Bitcoin Lost When Laptop Discarded as Junk (2010)
Software wallet
In March or April 2010, while a final-year student at St. John's University in New York, an individual purchased 10,000 BTC from a local seller for approximatel
Early Miner Loses 50 BTC: Private Key Gone, Wallet.dat Scattered Across Backup Media
Software wallet
In August 2017, a Bitcoin user (username lozzauk) posted on BitcoinTalk describing loss of access to a wallet containing approximately 50 BTC plus additional al
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Physical Coercion — Coercion Era (2023–present)
Seed Never Recorded — Coercion Era (2023–present)
Seed Never Recorded — Maturation Period (2020–2022)
Physical Coercion — Maturation Period (2020–2022)
Institutional Failure — Maturation Period (2020–2022)
Seed Never Recorded — Exchange Era (2014–2019)
Institutional Failure — Exchange Era (2014–2019)
Device Loss Without Backup — Exchange Era (2014–2019)
Forgotten Passphrase — Exchange Era (2014–2019)
File Deleted — No Backup — Exchange Era (2014–2019)
Device Discarded — Exchange Era (2014–2019)
Passphrase Never Recorded — Exchange Era (2014–2019)
Forgotten Passphrase — Early Bitcoin (2009–2013)
Institutional Failure — Early Bitcoin (2009–2013)
File Deleted — No Backup — Early Bitcoin (2009–2013)
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