No, no, stay positive. Instead ask: When Moon?
I don't know if they are overextended, or undervalued. Compared to Bitcoin it could be the latter..
My line of thinking is that this spring X amount of people entered the space and at that time 'we' the community decided on a price for each of these compared to eachother. So now a new group of crypto investors are entering the space once more, I believe they are discovering alts right now. If ETH was 10% of a Bitcoin 6 months ago and nothing fundamental changed (except ETH got better and BTC got worse..) then one would almost think that the same should apply now. Maybe it's wishful thinking...
I am still holding on to my ETH for now though. I feel like it has more room to grow.. with some of these former 'shitcoins' catching up it and Bitcoin so high it feels like ETH should be a lot higher than it is now.
Litecoin.. I don't know. I was holding Litecoin for 3-4 years before I could get out. I am totally disillusioned with it and no longer believe at all in it.. I kind of think the only reason it's going up is because it's one of the few coins that is available as much as Bitcoin.