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In 2009, Bitcoin had a very dangerous feature so severe that Satoshi himself removed it after a user pointed it out.
In the original version of Bitcoin, you could send coins directly to someone’s IP address.
You didn’t need a wallet address, and worse, your computer would connect to theirs to send the coins through it.
That meant anyone could see your IP address, locate your device, and try to attack it simply by sending Bitcoin to you.
On January 14, 2009, Satoshi decided to test it himself and sent an email to an early miner named Dustin Trammell asking for his IP address.
Trammell responded and actually sent it to him.
A few minutes later, Satoshi called and sent him 25 Bitcoin with a message that said “Hello.”
Trammell replied with a warning that the feature was not safe, and within weeks, Satoshi completely removed it from Bitcoin.
Those 25 Bitcoin are worth $1.86 million today.