Is this bad or very bad for monero?
Will this implementation allow Satoshi to spend his coins without anyone knowing?
No..
Thus, it's very good for monero.
Personally I don't think Bitcoiners will ever implement a way for "Satoshi" to be able to move his coins without no one knowing... I mean shit, if Satoshi is really still alive and hanging around, do you really think that he won't just cash out a good portion of his stash for other investments into gold/silver/fiat/etc.? It's like he's (his coins) are held captive as some prisoner in a world that he "single handedly" created, which is insane to me. If he were to move his coins, then Satoshi's baby he created would essentially be decapitated and the trust people have in Bitcoin would be lost forever.
And then other people who are heavily invested into Bitcoin sit there on their high horse and say that fungibility isn't a big concern... I feel bad for Satoshi.
Who knows if Satoshi even has the keys to those coins. He could have just mined without actually believing BTC would become what it has.
If that's the case, that could possibly be the biggest TIFU for the entire history of the internet lol.
It may sound crazy to you but satoshi probably does not care. As he was able to create something so great, he has likely either made enough money in the past, or is confident that he can make in the future.
Compare to Crypto Kingdom, which is not nearly as great an invention. My position is currently worth about €400k, yet there is no way to sell it and actually I recently "donated" about half of it to the game so that I am only entitled to the profits. If I am completely fine with the state of affairs, surely satoshi is as well, after all his capabilities are much larger than mine.
Well I certainly can't see anyone "not caring" about an estimated 400 mill. He/she/they must be billionaires if that's the case, and if that is true, why would "Satoshi" even take the time of creating something that essentially replaces the fiat system in the first place? I think Satoshi was very well aware of what he was doing; and even though he/she/they were probably well off, I don't see how Satoshi could write off a hundreds of millions of dollars.
What I'm trying to get at is not about Satoshi's wealth in general, or the fact that he cares or not about Bitcoin any more... It's more of the notion that he
couldn't move his coins even if he did have the keys or wanted too in general. That, to me, illustrates the importance of fungibility and Bitcoins main problem that Monero solves.