i've been hearing a lot about something called Ethereum these days .
if you know any informations about Ethereum please comment it so i can know more about it .
and is it true that he threatens the existance of bitcoin ?
Ethereum is an alternative coin or an altcoin .. It is just another cryptocurrency , you can go to myetherwallet.com to if you need to store some of your ethreum . You can also convert this to bitcoin. 1 ether is equals to .08 and this is the best rate i know .