In 2018 there will be many new technological projects, I think that it will be very cool. So I think that you need to leave some money for future projects and not invest everything in what is now on the market.
We do have very many good coins are really growing up well in the market with good values. We can still consider the top coins which would really profit in short while. Go through the list of top altcoins in coinmarketcap.com. Lets wait and receive the new altcoins seperating a lump of amount to invest if worth.