It has to be ethereum only. Other than that coins like litecoin will also grow because of extremely low fees .

No one can tell exactly except Mark. He might be planning something integrated with Facebook .

That crash from $19000 to $7000 was very disappointing for me. It would irritate a lot of other investors as well.

If you had a general store and  a new store opened up with unique features and then eat up your business. Will you love that new store ?

Yes, you should got for it. It would be $15000 by the end of this month. Mark my words and and invest, thank me later. It already jumped 10% in last 2 hours.