Top 3 currencies to invest before 2018 are
1) Bitcoin 2) Ripple 3) Ethereum which are extremely beneficial in the long run. Guys for full detail visit Youtube video
http://www.youtube.com/watch?v=Ed-HjdHfCjY&t=115s
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TOP 3 before 2018
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1) bitcoin cash (BCH) because currently at the beginning, it will maintain and keep rise up because of the originality of bitcoin while bitcoin not the original since segwit1x
2) dash
3) litecoin (LTC)
these 3 coins will be the top based on stability and maintain