In no particular order:
NEO
Litecoin
Iota
Tron
OmiseGO
Modum
Cardano
Substratum
AirSwap
UnikoinGold
Loopring
BitShares
Electroneum
why not include bitcoin and ethereum? I think you will regret if you do not include it in your portfolio this year and the future.
Yes, all crypto investors should keep some bitcoin in their portfolio. I usually keep more than 50% of my crypto investments in Bitcoin and rest of them I will diversify in other altcoins.
Each individual will have their own preference to invest but from a long-term perspective, NEO, IOTA, ETH, LTC, NEM, Waves, OmiseGo and QTUM may be good options. These are some of the good projects so expect good returns over the time.
Bitcoin and Ethereum is the most promising crypto coins that will give you a huge profits. Bitcoin, Ethereum, Neo, Iota, Litecoin , bitcoin cash and ripple is my top coins for 2018/2019.