There was a time when Poolin ranked among the three largest Bitcoin mining pools in the world. Today, the Singapore-based company has officially filed for bankruptcy, unable to repay thousands of users who have been locked out of their funds for over two years.

The collapse of Poolin is no surprise — it is the painful epilogue to a liquidity crisis that erupted in 2022. But for the 11,700 creditors still waiting to be repaid, it marks the end of a long and fading hope.

Here is a look back at the trajectory of a player that once dominated the global hashrate before crumbling under the weight of its own promises.

From Glory to Frozen Withdrawals: How Poolin Lost Everything

Founded in 2017, Poolin quickly climbed the ranks to become one of the most powerful mining pools in the world. At its peak, the pool controlled a significant share of Bitcoin’s global hashrate, competing directly with players like Antpool and F2Pool. Its platform attracted professional miners and retail investors alike, drawn in by attractive yields and an accessible interface.

Everything changed in the summer of 2022. In the depths of a bear market, Poolin announced the freezing of withdrawals on its treasury management platform, citing liquidity issues. Users who had deposited funds in exchange for returns found themselves locked out overnight. The decision sent shockwaves through the mining community: millions of dollars were frozen, with no clear repayment timeline in sight.

This crisis unfolded against a backdrop of cascading failures — Celsius, Voyager, FTX — that shook the entire crypto ecosystem to its core. Poolin, already under severe pressure, never managed to recover. Restructuring attempts failed one after another, and the company accumulated mounting debts to its users in the form of IOUs.

11,700 Creditors, Texas Mining Sites for Sale: The Reckoning

The bankruptcy proceedings officially launched in Singapore mark the beginning of a liquidation process. In an attempt to repay its creditors, Poolin is auctioning off its remaining mining sites in Texas. These facilities represent the company’s last tangible assets — mining farms whose value depends directly on the price of Bitcoin and local energy costs.

The 11,700 users still holding IOUs are waiting to find out what fraction of their funds they will actually recover. In crypto bankruptcy proceedings, repayments are rarely made in full: unsecured creditors typically recover only a portion of their original stake, sometimes years after the fact. The outcome will depend on the proceeds generated by the auctions and the hierarchy of claims established by the court.

This case highlights a structural risk that is consistently underestimated in the mining space: the centralization of funds on third-party platforms. Miners who entrust their treasury to pools or asset managers expose themselves to a counterparty risk comparable to that of centralized exchanges. The collapse of Poolin joins a long list of hard lessons for an industry that still struggles to clearly separate asset custody from mining services.

Bitcoin Mining After Poolin: A Sector Consolidating

The disappearance of Poolin mechanically redistributes hashrate share toward the surviving pools. In 2025, the Bitcoin mining landscape is dominated by a handful of institutional players — Foundry USA, AntPool, ViaBTC, F2Pool — which capture the vast majority of global computing power. Concentration accelerated sharply after the 2022 bear market, which wiped out the least well-capitalized operators.

For individual miners, choosing a pool has become a matter of serious due diligence in its own right. Transparency around fund management, asset segregation, and the financial soundness of the operator are now criteria just as important as commission fees or payment frequency. The Poolin lesson is at least unambiguous: a mining pool is not a bank, and any yield promise backed by no solid guarantee deserves the utmost caution.