Ethereum, Dash and Ripple are very promising altcoin and worth to invest. I will invest in Ethereum because for me Ethereum is the best. This is a very popular altcoin, it is many investors hold, every day Ethereum has a huge trading volume. I believe that in the next few years Ethereum will grow strongly and compete with Bitcoin as the throne of the crypto market. I guess that by the end of this year Ethereum will easily pass $ 1200