1. Quantum Computing and the Potential to Break Bitcoin’s Security:
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Current quantum computers are far from sufficient to threaten Bitcoin's security. Furthermore, their development is not as rapid as expected, so there's still much work to be done to address the threat of quantum computing.
2. Changes in Regulations or Complete Bitcoin Bans:
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With the massive adoption of bitcoin now, there is no benefit for the government if they ban it. On the contrary, there is more loss if the government bans it because bitcoin has had such a significant impact in terms of taxes and economic benefits. Meanwhile, the UN, what do they have to do with bitcoin? they have no right to prohibit the circulation of bitcoin globally.
3. Bugs in the Protocol or Undiscovered Security Vulnerabilities:
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There are bitcoin core developers who will deal with this and will patch bugs if any are found, so that it will not disrupt bitcoin as a whole.
4. The Emergence of a New, Superior Cryptocurrency:
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There are many shitcoins that offer speed, lower fees, and various other things, but until now none of the shitcoins have been able to compete with bitcoin, because only bitcoin offers complete decentralization, and that is what keeps people trusting bitcoin.
5. Changing Community Attitudes and Trends:
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Something extraordinary must have happened that caused people to lose faith in Bitcoin and abandon it. But so far, this is all just speculation, and there's no chance of that happening. On the contrary, more and more people are adopting and trusting bitcoin.
6. Abuse for Illegal Activities:
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Bitcoin will certainly be used by criminals for their crimes, and that is the same for fiat and other assets, but that does not mean that bitcoin loses its decentralization. Even though the government has tightened the rules for using bitcoin, it is limited to the scope of regulations, you still have ways to use bitcoin without being bound by these regulations. That's why it's important to understand self-custody and protect your privacy.