I've been involved with crypto investments, ICO Airdrops and bounty programs, I have a couple of tokens which anyone can call shitcoins, but looking at the crypto space in few years from now (say 5 years) would it be right to say that some shitcoins would eventually turn to something huge for instance Dogecoin (Doge), NETKOIN (NTK), Obitanchain(OBTC) and the rest?
It depends on how good each and every project is. Some coins may get attention, but it's hard to tell which of your coins will succeed. And the success may also be "moon" for some and limited (under one cent) for others.
You wrote about Dogecoin. I hoped, long years ago, that Dogecoin will reach one cent. Then I learnt and moved away. Meanwhile Bitcoin grew a lot, but Dogecoin has mostly fallen afaik. Why? Because Dogecoin, while it's an interesting idea, while it's great for fast exchange or learning, it's inflationary - the supply grows too much and continuously - making the coin more and more worthless.