The best thing is to buy Ethereum, Bitcoin and such coins as:
1. TRX
2. Ripple
3. Litecoin
4. NEO
But the last four it's my opinion - you can choose something more
However, put most of your instment into Ethereum and Bitcoin
It's for save
good portfolio ecxept trx
it is overpriced now. be careful when you will take this coin.
xrp ltc oand neo is good choise