successful cryptanalitic attack on private keys, excessive mining monopoly, global internet shutdown (possibly), massive loss of interest.
How can private keys be attacked? Is this through an infection of a malware or spyware? I am a bit confused on this part because I am 100% on the security feature of bitcoin.
A total disagree on the massive loss of interest. Bitcoin is a booming trend all over the world. I guess we don't see loss of interest happening in a few years time though.