There are too many factors that can influence exchange rate. Individuals can manipulate it as well as big institutional investors.
Just take a look at Roger Ver or John McAfee.

1. World of Warcraft
2. Warcraft 3
3. TES series (love them all <3)
4. Neverwinter Nights
5. Call of Duty 4
6. Doom 3
7. Half-Life 2
8. Dark Messiah of Might and Magic
9. Portal 1 and 2
10. Mass Effect

Not being a professional though, I would advice to store at least 50% of your budget in BTC, 30% to spread evenly between top 10 coins on coinmarketcap and the rest 20% for investment -- e.g coins of your choice from second page of coinmarketcap or promising ICO.

I really like Coinomi as well. I was actually looking for an easy way to change my BCH to ETH without and then I noticed that Coinomi is integrated with Shapeshift.
So if you're looking for a wallet that supporting multiple currencies and most of new tokens, Coinomi can be a decent choice.