Satoshi Nakamoto built in defenses against quantum computing attacks – If you use one Bitcoin address one time, then your ECDSA public key is only ever revealed at the one time that you spend bitcoins sent to each address. A quantum computer would need to be to break your key in that short time.

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Bitcoin – The Currency of the Internet

Chatting to a taxi driver last night who tells me he has to pay £120 per week to be able to take card payments in his taxi. We then had to spend a couple of minutes manually typing the numbers into the machine. If only there were a quicker means of payment with lower costs of transacting 🤔

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Bitcoin – The Currency of the Internet