If you go from another side to this question, then there are these thoughts:
For example, Satoshi understood that bitcoin in the future could cost very much.
In the beginning, it has and uses the client (program) 0.1.0-0.1.5, etc. which, I understand, mined coins and the transfer went every time to a new address from the address pool that the client created (100 addresses are acceptable). As soon as 100 addresses ended, the client automatically added 1 or 100 addresses to its database.
No. The keypool is maintained at 100 addresses everytime its unlocked and opened.
But what about the security of the computer before the lightning or short-circuit, coffee, etc.
In fact if the computer with the extracted coins burned, all disappeared. It should also be possible to quickly and / or automatically extract privat keys for printing on paper, for example.
Intuition is good, but everyone knows how to value their work, it was necessary to make such a decision.
It was like that realized?
Among you there is who mined the blocks - coins in on the first versions of the Satoshi client program?!?
Sorry to say but you aren't making any sense at all.
Security of the computer only concerns the addresses that satoshi owns. If someone elses got access to his unlocked wallet, they could possibly obtain and control all his addresses. If the computer with the addresses that contained the mined coins somehow got destroyed, it is possible for satoshi to recover the data on it himself using a data recovery software or company with the hard disk. It is NOT possible for anyone (satoshi included) to obtain the private keys to addresses that they lost without access to the private key.
You really have to read up on Bitcoin (whitepaper etc). Your questions do not frankly make sense at all.