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i think electroneum will be a good choice for 2018. as well as IOTA and OmiseGO

Electroneum will be good choice if more exchanges than Cryptopia list it... Even on low-end hardware it doesn't take more than 1-3 days to get minimum payout from a good pool. I mine on 7 pools to get best results as most pools have issues with automatic difficulty adjusting in Stratum proxy if using more than 1 core.