For my opinion i think BTC still best option because of its limited supply only 21 million . But ETH network conducts more transactions at a higher speed than bitcoin, 99% of the alternative coins are based on the ETH network, judging by the use of of course the ethereum for me this is both Both ethereums and bitcoins will be winners this year in addition to many other altcoins.  I believe this year we will start seeing huge gains starting now.  It's altcoin season and naturally bitcoins will also rise in price.