Here are some rare and interesting facts about Bitcoin (BTC):

Lost BTC Is Gone Forever – Unlike traditional banking, Bitcoin transactions are irreversible. If you send BTC to the wrong address or lose access to your private key, those coins are permanently lost. It is estimated that around 20% of all BTC is lost forever.

Bitcoin Was Sent to Space – In 2016, Genesis Mining sent the first Bitcoin transaction to space using a weather balloon. A hardware wallet was attached to the balloon, and transactions were broadcasted from Earth.

Satoshi's Secret Stash – Bitcoin's creator, Satoshi Nakamoto, mined around 1.1 million BTC in the early days but has never moved them. These coins are now worth billions, but their status remains a mystery.

First Commercial Bitcoin Transaction Was for Pizza – On May 22, 2010, a programmer named Laszlo Hanyecz paid 10,000 BTC for two pizzas, marking the first-ever real-world purchase using Bitcoin. This day is now celebrated as Bitcoin Pizza Day.

Quantum Threat? – If quantum computers become powerful enough, they could theoretically break Bitcoin's encryption, making current wallets insecure. However, Bitcoin developers are already working on quantum-resistant cryptography.

There Are Only 21 Million BTC – Bitcoin's supply is capped at 21 million coins, making it deflationary. Unlike fiat currencies, no more BTC can be created after all have been mined.

The FBI Holds a Large BTC Stash – After shutting down the Silk Road marketplace in 2013, the FBI seized around 144,000 BTC. Over the years, various government agencies have auctioned off seized Bitcoin.

Bitcoin Survived a Fork War – In 2017, the Bitcoin community split due to debates over scalability, resulting in the creation of Bitcoin Cash (BCH). However, Bitcoin (BTC) remained the dominant chain.

A Bitcoin Can Be Divided into 100 Million Units – The smallest unit of Bitcoin is called a "Satoshi" (0.00000001 BTC), allowing for microtransactions.