Joke's on you! No bullets.
@lemmus.org
Perhaps I am. I'm referring to your malicious actor you believe will rob you of your holdings. What does that look like? Some nebulous entity undertakes the task of acquiring greater than half of the processing power of the Bitcoin Blockchain, expending enormous resources to do so, for the purpose of reverting the $500 they paid you? And they're not at all worried about devaluing the network they've invested significant resources into controlling, they just want their $500 back? The attacks are theoretical because they're not practical and require illogical actors working against their own interests by undermining the network they're supporting. It would be like a bank who takes deposits, but doesn't allow withdrawals - who would trust them? They'd go bankrupt for their efforts.
It's your position and pose on the scale. Unless you have a very expensive, scientifically accurate scale, the pressure you place on it with your feet relative to the location of the sensors can make a significant difference. It's why I always do a hand stand on mine.
Notice I put quotes around rewritable. That's because it's not the correct term, and I was being charitable in engaging in your straw man argument. It's actually a collision of timing, where two solutions are presented for the same block in a short amount of time, and until the consensus is reached by the majority, both are temporarily valid. Once consensus is reached, it's final. There's no going back. In that sense it is not rewritable, it is immutable. It's just fuzzy for the first fifteen minutes which branch will resolve as the actual Blockchain in the event of near ties.
It's not as simple as that. Each block solves the problem of the former block, so to change something five blocks back, you now need to solve six blocks prior to writing the next block, otherwise it's not cryptographically valid. The resources required to accomplish that are not trivial, and it's never been done. Very theoretical indeed, in the same sense you could theoretically run through a wall if all of your atoms missed all of the atoms in the wall when you should have collided.
Have you read all of the DCC books? The humor in the last two or three books doesn't seem drastically different to me from Seth MacFarlane's creations. It makes me wonder what aspect of Seth MacFarlane you dislike.
Only the last few blocks are "rewritable," which is why a certain number of confirmations are a necessity. Going any further back than that, would be a completely different chain - a fork. The last of of those occurring on Bitcoin was thirteen years ago when it was still encountering growing pains due to an uptake in usage. Forks of more than a couple transactions are not a frequent, regular occurrence by any exaggeration, so for all intents and purposes of modern crypto usage, it is immutable, not "rewritable.'
I bought a MacBook Pro for iOS development. It was alright until Apple decided to exclude it from future OS updates, preventing me from using it for it's sole purpose, and forcing me to either buy a new one or stop developing iOS apps. Guess which one I chose. There is nothing wrong with the hardware, it's still got a 2TB SSD, 16GB of RAM and 16-core CPU but apparently Apple thought they could make more money off of me by intentionally barring it from updates to force me to buy a new one, rather than simply allowing me to install MacOS updates. They were wrong.
Edit: 8 physical cores, 16 logical
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