Re: Will Bitcoin be replaced by another cryptocurrency?
Yes it could happen but i doubt very much it will happen the short to medium term, to actually make bitcoin obsolete would be a achievement.
It would have to offer something very important for mass adoption which Bitcoin doesn't offer.
Transactions that confirm in a minute?

Seriously, mass adoption means people actually use it for their shopping. If you send coins but the vendor doesn't receive them, then you are in limbo - some ordinary people will even accuse the vendor of doing something shady, when the problem is that the transaction isn't even in the blockchain.
It will be something that simple that will prevent bitcoin mass adoption.