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.

submitted by /u/crazyeyes420
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Bitcoin – The Currency of the Internet

Bitcoin is stable. It has survived a civil war, spam attacks, 1 exchange by volume shutting down (Gox), and will survive a nuclear apocalypse. The price in fiat/BTC fluctuates because it’s the volatility of the world entering the stability of Bitcoin in ebbs and flows.

submitted by /u/andhiriano
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Bitcoin – The Currency of the Internet