I almost trade and invest in each of these three and right now i dont think we should miss the opportunity to invest in all these three coins. Ethereum is not only the coin it is one of the best platform that connects us in all the current and upcoming ICO's projects. While Litecoin is also good altcoin which can be traded both for long term and short term. But these two coins can't match the beauty of bitcoin which is considered to be the king of the crypto market and i will go with bitcoin first than these two.