For a little aggressive portfolio, I would recommend:
Bitcoin - 15%
Ethereum - 10%
Ripple - 10%
Litecoin - 10%
Neo - 15%
IOTA - 10%
Straitis - 10%
Mysterium - 10%
TenX - 10%
You can pick and choose from these, but these are the coins that I feel have a higher potential of going up. Also, buy them at wholesale price and not at retail prices.