Etherium is a reliable crypto currency, but investing all your money in the Etherium is too risky. The situation on the crypto-currency market is unpredictable and can change in any direction.
Absolutely, i support you in your decision making buying ethereum coin. Then if you have a enough money go for it. Ethereum is good potential alternative coin and they are next to bitcoin in all aspect of price value. The speculation of 2018 is not possible to happen because they are on right track. And if i have money same as i will go for it as you do.