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this is the math behind creating a bitcoin private key =)

Is this safe?
how about address on site trading. as poloniex, bittrex?

Yoo sir. Thanks for explaining. I get more knowledge for this.
Nice sharing. Good job.
Hope you luck and succes in the future.

any exchange is a third party that controls your private key. this is the worst, most unsafe way to safe your coins!
Everyone recommends a wallet, hardware wallet, paper wallet or this coin flip method demonstrated in the video

Yes, right.

And, so update, update, update.

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