i think Etherum and bitcoin both are productive..its very difficult to say which one is more good.time will tell the reality
There is no guarantee for any good coin this year. almost all coins have decreased drastically. For me that coin with high popularity is a best investment choice. Coins such as Bitcoin, ripple and Etherum are a top choice. By investing in the coin then our worries will decrease because we will get a much better trust. the coin must have many users so a drastic decline is a very small thing to happen, yes the risk is very small compared to the unpopular coin.