I've got a question regarding Ethereum in general.
Let's say ETH falls apart with it's price.
How does it affect coins which are based on Ethereum? Do they also take some damage or something?
How they're connected with each other if at all?
Another thing is - I've read somewhere that ETH founder (Vitalik Buterin) can wipe all of your ETH with one command or something like that. Is it some meme or is it actually true?
Most tokens follow ETH's price but mainly they are connected for two reasons they were funded in ETH and if the price fall is due to something like network congestion that makes the network unusable it obviously also makes it impossible to move around the tokens.
Vitalik can't wipe all the ETH with one command, if he tried to implement something too contentious there would be another fork. Some people even suggest he won't be able to move ethereum to proof of stake as planned because the miners want to keep their profits.