Could anyone suggest me which one is worth to hold here is the list of coins, Xvg, Dgb, Sc, Waves, Doge, Rdd, stratis, Xrp.
From your list I would only suggest waves for long term, but that too is risky. I'm sure you already know that BTC and ETH are probably the best bet right now for long term holding with the lowest risk factor. Go with them if you don't want unnecessary risk.