Block21k

@block21k

21M coins. 210K blocks. Bitcoin moves in cycles — I track the rhythm. Dropping knowledge, but having some fun too. Not financial advice, obviously

Joined June 2025

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Block21k@block21k · Jul 6

In 2011, Bitcoin was a different world No seed phrases. No hardware wallets. No slick apps Just raw private keys, fragile files, and command lines Today, someone just moved 80,000 BTC from that era Here’s how they did it—and why it’s borderline insane 🧵👇

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Block21k@block21k · 13 h

As promised, here is the follow up post on the mechanics of perpetual futures funding rates x.com/block21k/statu…

BBlock21k@block21k · Jul 25

🧵 Futures Contracts 101: How Bitcoin’s Most Powerful Trading Tool Just Went Legit in the U.S. If you care about Bitcoin, TradFi, or markets, this is one of the most important unlocks since the ETF 👇

Block21k@block21k · 16 h

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BBlock21k@block21k · 17 h

Today is Friday! And that means it’s weekly options expiry 📅 IBIT max pain is at $66, which is roughly $115,500 BTC. This level is likely to act like a magnet today 🧲

Block21k@block21k · 17 h

Today is Friday! And that means it’s weekly options expiry 📅 IBIT max pain is at $66, which is roughly $115,500 BTC. This level is likely to act like a magnet today 🧲

BBlock21k@block21k · Jun 29

What is “max pain” in Bitcoin options — and why do traders watch it? 🧵👇

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