for real, go at least 50% of your money into ETH, for save returns. for the rest i could suggest many, my favs are probebly

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Neo (i think this could go insane, contracts to chinese gov, smart contracts with classic programing languages),

XLM (partnered with IBM, basicly decentralised ripple),

IOTA (this will be huge too imho, china already tries to implement it in their IOT),

OMG (OmiseGo, a promising decentralised exchange, could be huge when regulations hit),

PAY (TenXPay, multi crypto debit, able to pay with crypto as euro, already had working cards, currently working on getting a new card issuer since the old one got his licence revoked),

XRP (not my fav, but it has many corporations, and it has been there for very long, which means they had much time to work out partnerships, so its probably not bad, but one of my least favs)

EOS (nice smart contract platform, with a few upsides that ethereum cant really copy, high risk/reward)
And good old bitcoin BTC (allways worth an investment, crypto gold)

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Honestly, if you split 50 eth / 50 into various like 3-7 coins that i listed, you will earn money, i would say i gurantee it if i wouldnt mind saying gurantee in this context