2. Satoshi got depressed, because bitcoin not worth anything to him anymore... he couldn't mine anymore because of the difficulty increase.
3. Start a new coin... and mine it early to get rich once again ! LOL.
1. Satoshi was smart and intelligent enough to invent Bitcoin. Surely he can handle wallet backups and secure his private keys? This is a no-brainer.
2. Point doesn't stand because point 1 doesn't stand.
3. Bytecoin? Remember the bug that created 184 Billion Bitcoins? Now Bytecoin has 184 Billion total coin supply. Probably Satoshi wanted to give a subtle sign that he was working on Bytecoin now? /JOKE
Wonder how many will look into this hint of bytecoin (you never know about them jokes, sometimes they have meaning to them), not many people can see past all the 1000's of alternative's over the years (most of the originals have a set purpose though, scrypt & many other algorithms)? Depending on how much time one spends on learning this new world of crypto (knowledge is key), seeing the world is not just Windows & Mac/Apple anymore. We now have 100's of Operating Systems, several web browsers, millions of applications & many more things that I could go into detail on... I'm just an uneducated nobody though (Autodidacticism), took over a year (16+ hours a day, 7 days a week of just doing research) in crypto to actually see that it will change the world (look past all the bad news, you'll see more good things it can change)...
// 8 bits = 1 byte ~ pixels
https://web.stanford.edu/class/cs101/bits-bytes.html
First PC ever build piece by piece (over 10 years ago), bought the spare parts from Bits&Bytes