I think 2018 will be a turn in crypto world, and yes I agree all shticoins will disapear, however I do not share your idea about dogre which is for me shitcoin wiht no future
2018-2020 is going to be potentially massive we may see some regulation coming in but excellent time to buy now and invest for Long Term. I personally reckon the coin's with Sold Technologies will stay.
Too many Ponzi Scheme's and pointless Alt's there. Over longer term around 100-250 will last rest won;t.
Top 100-250 Coin's are a safe bet and maybe Top 10-25 as well.
DOGE is worth a punt as like LTC it's been around since the start. DOGE I have bought as you never know it can go to $1 and imagine the gains!!!!