Is there any other reasons for recent drop and where will the price most likely to go?
The downtrends seems to be prolonging for a long time should I hold and wait?
your timings are too wrong.
that news is very old now and it didn't have any effect on price whatsoever. the first big drop was because of the first burst of the bubble that ethereum is in and also the fact that it was initiated by the bitcoin price drop.
then price did a recovery or also known as a dead cat bounce and now the bubble is continuing to burst.
you can't expect an altcoin to go up more than 1000% and not drop the same amount afterwards.