Colin Harper

Contributor at Forbes

"He writes for Bitcoin" EIC Blockspace Media (@blockspacepod) Senior Contributor @ForbesCrypto Formerly words + research @LuxorTechnology / @HashrateIndex

Articles

What Antalpha's loan book can tell us about its relationship with Bitmain

1 day ago | blockspace.media | Colin Harper

Antalpha might be leaving money on the table to better serve the interests of bitcoin mining’s biggest company: Bitmain. Last month, Antalpha (ANTA) conducted an initial public offering (IPO) on the Nasdaq exchange, raising $49.3 million at a $329 million valuation. The IPO was a success in many regards, and it also laid bare the financials and operational ins-and-outs of Bitmain’s top financing partner in what has been historically an obfuscated business.
Riot may sell 16% stake in Bitfarms, filing shows

3 weeks ago | blockspace.media | Colin Harper

Correction June 4, 2025 (1:40 PM EST): The original version of this article incorrectly stated that Riot had sold its stake in Bitfarms. The shares are listed for sale, but they have not been sold yet. Riot Platforms (RIOT) may sell its multi-million dollar stake in rival Bitfarms (BITF), per a recent filing.
Quem Ainda Está Lucrando Com a Mineração do Bitcoin

3 weeks ago | forbes.com.br | Colin Harper

O halving é um evento que acontece a cada quatro anos e reduz a quantidade de bitcoins gerados pelos mineradores em cada bloco. Recentemente, ele diminuiu o subsídio por bloco do bitcoin de 6,25 BTC para 3,125 BTC. Com isso, os mineradores passaram a ganhar US$ 203 mil (R$ 1,14 milhão) por bloco com a emissão de novos bitcoins, valor bem inferior aos US$ 406 mil (R$ 2,29 milhões) anteriores, considerando os preços atuais.
Bitmain Reveals The Antminer S23, The Most Powerful Bitcoin Miner Ever

3 weeks ago | forbes.com | Colin Harper

Bitmain, the leading manufacturer of bitcoin mining computers, just launched the Antminer S23, the most powerful and efficient bitcoin miner model yet. The company unveiled the Antminer S23 series at its World Digital Mining Summit in Las Vegas this week. The Antminer S23 comes in three flavors: an air-cooled, water-cooled, and immersion-cooled model.
Are These Companies The Next MicroStrategy?

4 weeks ago | forbes.com | Colin Harper

Strategy – formerly MicroStrategy – bought its first bitcoin in August 2020. With the 21,454 BTC purchase (valued at $250 million at the time), the world’s first bitcoin treasury strategy company was born, and now Strategy holds 580,250 BTC – 2.9% of Bitcoin’s circulating supply valued at $60.8 billion. Strategy issues convertible notes – a form of debt that creditors can redeem for stock in lieu of cash repayment – and equity to fund the purchases.
Bitmain releases Antminer S23 Hydro at 2025 World Digital Mining Summit

1 month ago | blockspace.media | Colin Harper

Leading ASIC manufacturer Bitmain unveiled its new ASIC miner model, the Antminer S23 Hydro, at its World Digital Mining Summit in Las Vegas this week. The new water-cooled model, the Antminer S23 Hydro, clocks in at 580 TH/s with a 9.5 J/TH efficiency. The Antminer S23 Hydro will be available starting in Q1 2026 and starts at $25.5/TH after coupons.
What You Didn’t Know About Laszlo Hanyecz, the Bitcoin Pizza Day Legend

1 month ago | coindesk.com | Colin Harper

The skalds of Bitcoin Twitter have sung of the historic moment, the “first real world purchase” with bitcoin, and pundits have etched the story into the internet’s memory with headlines about the infamous Bitcoin Pizza Purchase, now dearly valued at more than $1 billion. But what if I told you that Hanyecz spent nearly 10 times more bitcoin following the historic purchase?
The Man Behind Bitcoin Pizza Day Spent More Bitcoin Than You Think

1 month ago | forbes.com | Colin Harper

For Bitcoiners, May 22 – known as Bitcoin Pizza Day – is a day for feasting. Today, Bitcoin fans around the world are savoring pizza to celebrate Laszlo Hanyecz’s famous pizza order on May 22, 2010. On this day 15 years ago, Hanyecz – an early Bitcoin developer and miner – paid another early bitcoin adopter 10,000 BTC in exchange for two large Papa John’s pizzas. This marked the first real world purchase of any good with the cryptocurrency, which was barely a year old at the time.
"Plebs eat first": How Parasite Pool plans to disrupt the mining pool model

1 month ago | blockspace.media | Colin Harper

Pleb bitcoin mining is having a Renaissance. A new pool called Parasite Pool has popped up from Ordinal Maxi Biz founder ZK Shark with a new, unconventional payout model with zero fees. Parasite Pool joins a league of cottage industry bitcoin mining startups that are challenging the corporate status quo. With noderunners bootstapping BitAxe miners alongside their Raspberry Pis, the open-source movement is gaining significant traction among both hobbyists and professionals.
“Huge Blow”: Bitcoin Miners Push Back Against Trump Tariffs

1 month ago | forbes.com | Colin Harper

Bitcoin mining companies are bracing for fallout from Trump’s global tariff rollout, a move that will increase costs on imported hardware and potentially stonewall the industry’s growth in the United States.