I recommend keeping 40% in Bitcoin. If the price comes down, at least you have some money elsewhere. And a drop in Bitcoin price will mean a rise in the price of altcoins.

Then hold about 40% in some of the top 10 coins. Ones I recommend are:

Ethereum (Ethereum is to blockchain what Microsoft is to the tech industry)
Litecoin (fast transactions, this will be required for crypto spending to become mainstream - e.g. at the grocery store)
Bitcoin Cash (same as Litecoin above)
IOTA (transactions between elements on the Internet of Things, which is set to grow exponentially in the coming years as more gadgets come to market)

Then invest the other 20% in ICOs. Very risky but potentially very high rewards. My picks are:

Electroneum (viral mobile mining app built for the masses - the ICO has finished but you can still get it for around $0.08/ETN)
Envion (BTC/ETH mining rigs placed directly at sources of cheap energy)

That's it... $7000 spent!