Which 10 Altcoins are the oldest?
Currently I can think of Litecoin (2011), Namecoin(2011), Peercoin (2012), Ripple (2013), GridCoin (2013) and Dogecoin (2013).
All of them are active till now.
Some more can be found here
https://en.wikipedia.org/wiki/List_of_cryptocurrenciesThose coins are really old and most have a decent amount of Bitcoin holding them from dropping down in value. While people out there like to lose a bunch of Bitcoin on new coins and their ICOs the price of these coins could make them some money since they are old and have been through the times of Digital payments. Litecoin is one of the coins on there that is doing really well considering how old it is.