I would split it up this way:

20% BTC - Always going to rise. If BTC falls all other altcoin will too.

20% LTC - Very undervalued. I see hugh gains in the next 1-2 years. Basically the little brother to BTC.

20% Ripple- I personally don't like it but I guess it is very solid. Hard to say if it goes up that high.

The following two are wild guesses by me.

20% AntShares(NEO) - going to be Chinas national wide used cryptocurrency.

20% Ether LBRY, Steem, Sia, Stratis (probably the most solid of these?) - look them up and decide what you like best