I think it is blockchain,it is very good for bitcoin with many times protecd,you have confirm email when log,use authy,and code to transfer [Suspicious link removed]ut your wallet
Eth is vẻty safe,if you hold eth you can x2 your money end 2017,i beleive eth can reach 1500-1800 in this year but with altcoin you can x many times but you can lose all money,hight risky hight profit