My suggestion is Bitcoin and Ethereum.. Cause, a lot of people still hold and trade with these pair..
You don't need to doubt on this two great coin before fore sure it can give you a big profit in the future. If you are just newbie in this market then investing with ETH and BTC is really advisable. Don't just invest on any coins without any understanding about it. Try to study more the market, so you will be know where to invest next time so for now, better to go for BTC and ETH.
Bitcoin is Still the best coin for either long term or short term investment. Based on the market history, from the last few years, Bitcoin show's the most stable, with good market structure, good fundamentals, and with high level of confidence from the investors, we've seen a lot of news items
regarding the story of good furtune from Bitcoin investment.