Based on what it has been seen among the wide array of altcoins such as development, innovation, and security issues, what altcoins might survive in the future?
In my opinion, I think that the only ones prone to survive would be good old altcoins such as Litecoin and Dogecoin, but I may be wrong.
Nevertheless, I would like to know your opinion about this as well as any altcoin that might be worth holding onto for the long term.

From my point of view, this current crypto market would filter the bad quality coins. There is some potential cryptocurrency in top 10 of cmc that I think it could survive for a long time such as ETH, NEO, EOS, etc. these also an old coins but its have a strong background that it could support them go through the bad situation. However, they have to try applying the coins in the real life that's the big trouble for all of the cryptocurrency now.