Ethereum and Bitcoin are good as they are safe ones. The smaller part of your investment you can buy something from the big list.
But you must find them yourself, it's better that way. I have tried to invest short term myself, but it ended to be a long term.
Definitely true, bitcoin is the top coin in the cryptocurrency so far. Many investor are encourage to start their investment in bitcoin because of its high percentage of earning. While in the other hand many ICO are using ethereum as the main token because it cheaper transaction. That's why this two coin has a really widen future.