ReSatoshi is one of the more thought-provoking new cryptocurrency experiments because it changes a rule most blockchain users take for granted: coins remain under the control of the same private key forever, even when that key has almost certainly been lost.
The project operates on an independent proof-of-work blockchain based on Bitcoin Core 31.0. It retains many familiar characteristics, including SHA-256d mining, ten-minute block targets, an initial reward of 50 coins and halvings every 210,000 blocks. ReSatoshi has its own genesis block, transaction history and network identity. It does not include Bitcoin balances and is not affiliated with Bitcoin, Satoshi Nakamoto or the Bitcoin Core project.
Its distinguishing feature is a 100-year expiration period for unspent transaction outputs, commonly called UTXOs. A UTXO can be understood as an individual piece of cryptocurrency that a wallet is authorized to spend. Under ReSatoshi’s consensus rules, an output expires 5,256,000 blocks after it was created—approximately one century if blocks arrive at the intended rate.
Once an output expires, it is removed from the owner’s spendable balance and its value enters a Recycle Pool.
Miners can gradually return that value to circulation by claiming up to one additional coin per block, provided the pool contains enough expired value.
This does not recover a lost wallet or restore coins to their former owner. Instead, it prevents the economic value represented by abandoned coins from remaining inaccessible forever. In Bitcoin, coins protected by permanently lost private keys still appear in the recorded supply but can never move again. ReSatoshi treats a century without activity as sufficient reason to recycle that value into the active economy.
The network cannot know whether an output is truly lost. It applies the same rule to every coin, including coins intentionally placed in extremely long-term storage. Owners can preserve their holdings by transferring the coins to a new address before expiration. Transferring the coins back to oneself creates a new output and restarts the complete 100-year period. The code also allows an output to be spent normally in its expiration block.
One hundred years is long enough that ordinary holders should never need to think about renewal more than once during their lifetime. Nevertheless, the rule introduces a new responsibility for inheritance planning, institutional custody and multigenerational savings. Heirs cannot discover a forgotten wallet after 120 years and expect the coins to remain available. ReSatoshi therefore replaces Bitcoin’s permanent ownership model with a form of ownership that must be demonstrated at least once per century.
Whether that is desirable is partly philosophical. Bitcoin’s rules do not distinguish between active savings and permanently lost coins. Some users view that permanence as essential: possession of the key remains the only requirement, regardless of how much time passes. Others may see ReSatoshi’s approach as a practical response to supply slowly disappearing through forgotten passwords, destroyed devices, poor backups and deceased owners who left no recovery instructions.
ReSatoshi says it launched without a premine or spendable genesis allocation. Its source code is public, and its Windows application combines a node, wallet and basic CPU miner. However, SHA-256d is not designed to remain CPU-friendly. If the network attracts attention, specialized ASIC equipment could quickly make ordinary computer mining uncompetitive.
The project is also at an exceptionally early stage. At the time of its announcement on September 8, block one had not yet been mined. ReSatoshi does not yet have the operating history, public explorer, independent infrastructure or outside code review needed to evaluate how reliably the network performs. Its Windows installer is unsigned, so users should verify the published checksum and approach the software cautiously.
ReSatoshi raises a legitimate question that fixed-supply cryptocurrencies rarely confront directly: should coins remain permanently unavailable when nobody has demonstrated control over them for an entire century?
The recycling mechanism gives ReSatoshi a real identity beyond being another Bitcoin Core derivative. Now it must demonstrate that the public network can operate reliably, attract independent miners and nodes, and maintain its modified consensus code over time. Even if its answer is not ultimately accepted, the question it asks is worth discussing.
More information is available through ReSatoshi’s public source-code repository and official BitcoinTalk announcement.
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