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.

I think it won't just "might", but it "surely" will survive. I say that because altcoins is an important part of the cryptocurrency market. It gives the market competition and action that affects how the price of one coin varies with other coins. It also helps in maintaining transactions and business, especially when the market, specifically it's better assets are not doing good. Many altcoins are actually more invested upon by people because it's cheaper, and also, because of the quickness and ease of disposing it while getting a fair profit.