SBI Crypto to shut down mining pool that holds roughly 2% of Bitcoin's hashrate

Running a mining pool used to be a steady, if low-margin, business for the heavyweights of the crypto industry. It was about prestige, network security, and keeping a finger on the pulse of the hardware world. But the landscape is shifting. SBI Crypto, a subsidiary of the Japanese financial giant SBI Holdings, recently announced it is shuttering its mining pool operations by the end of July. This isn't just a minor blip; it represents the removal of roughly 2% of the total Bitcoin hashrate from one concentrated provider.

The Institutional Retreat

For those who have been building in this space for a while, SBI was always the "adult in the room." They didn't come in with flash; they came in with institutional backing and a long-term roadmap. Since 2017, their pool has been a staple for industrial-scale miners who wanted a regulated, transparent partner. Now, those miners have until July 31 to point their machines elsewhere. After that date, the pool stops accepting contributions, and the payout window will eventually vanish.

When a player this significant exits, my first instinct is to look at the 'why' from a founder's perspective. SBI isn't going broke. They are likely looking at the unit economics of a post-halving world and realizing that the overhead of maintaining a pool doesn't justify the shrinking fees. In a market where massive pools like Foundry and AntPool dominate the lion's share of the blocks, being a mid-tier institutional pool is a lonely, expensive place to be.

Efficiency is the Only Metric That Matters

We often talk about decentralization as a moral or technical goal, but for the people running these rigs, it’s a math problem. The recent Bitcoin halving effectively doubled the cost of production for every coin mined. If you are a pool operator, your margin comes from the tiny percentage you skim off the top. When the block reward drops, your share drops, but your server costs, security auditing, and compliance expenses stay the same or go up.

For builders, this is a clear signal: the era of the 'generalized' crypto institution might be sunsetting. Companies are realizing they can't be everything to everyone. SBI is likely choosing to focus on higher-margin areas of their crypto business—like custody or exchange services—rather than the low-margin, high-maintenance world of hashrate aggregation.

What This Means for Network Security

The immediate concern whenever a pool shuts down is where that hashrate goes. If that 2% of global hash power simply migrates to the top two pools, we see a further narrowing of Bitcoin’s decentralization. We are currently in a state where just a handful of entities control more than 50% of the network's processing power. While these are mostly 'pools' made of individual miners, the management of those pools is becoming increasingly centralized.

I don't think this is a 'death of Bitcoin' moment, but it is a cooling-off period for institutional appetite in the infrastructure layer. If a giant like SBI can't see the path to profitability in mining services, what does that say for the independent developer trying to build new mining software or hardware auditing tools? It means you have to be leaner than you ever imagined.

A Lesson for Founders

The takeaway here for anyone building in the AI or crypto infrastructure space is about technical debt and market timing. SBI has been running this pool since the early days. Over nine years, an enormous amount of technical debt accumulates. Every time the Bitcoin protocol upgrades—think SegWit, Taproot, or the recent Ordinals craze—pool operators have to update their stack. They have to ensure their accounting is perfect and their security is impenetrable.

If the revenue isn't scaling alongside those maintenance requirements, the logical move is to kill the product. As founders, we often fall in love with our 'legacy' products because they gave us our start. But there is a particular kind of discipline required to shut down something that still works but no longer fits the economic reality. SBI is showing that discipline.

The Migration Path

Miners are now in a scramble. Redirecting hashrate isn't difficult on a technical level—it’s mostly changing some configuration files—but the due diligence on where to go next is where the friction lies. Do they go to a US-based pool with heavy KYC? Do they seek out a decentralized pool like Ocean to hedge against censorship? Or do they just follow the crowd to the biggest pools for the most consistent payouts?

We should expect to see a bit of volatility in the hashrate over the next few weeks as these miners test new connections. For builders in the data and analytics space, this is a great time to track the flow of 'orphaned' hashrate. It tells us a lot about the risk appetite of the people actually securing the network.

Building for the Next Phase

The exit of SBI Crypto from the mining pool business is a reminder that 'institutional' doesn't mean 'permanent.' In crypto, everything is experimental until it’s obsolete. If you are building tools for miners, don't build for the giants of yesterday. Build for the smaller, more agile operators who are finding ways to turn trash into energy or integrate AI workloads alongside their mining rigs.

• Watch the hashrate migration: Where these miners go will tell us who the next power players are.
• Respect the pivot: Closing a product line is often a sign of strength, not weakness.
• Focus on margins: In a post-halving world, the only thing that survives is extreme efficiency.

The mining sector is becoming a game for the specialists. The tourists and the generalists are heading for the exits, and while that looks scary on a news ticker, it usually paves the way for the next generation of builders to find a more sustainable way forward. Keep your eyes on the hash, but keep your hands on your own code.

Read the original at CoinDesk →