As I've said elsewhere, there are several reasons why transaction volume dropped. In truth, transaction volume can be a misleading indicator for adoption:
The overall trends should agree, but very large divergences (spam attacks, periods of temporarily high activity, anomalies) can occur.
I have no doubt the network has grown in the last several months, but if you look at the last 6 months,
mempool size has increased as much as 50-100x over some periods. That can't possibly represent legitimate organic growth, especially when you consider how empty mempools are today.
It seems pretty clear that a significant ongoing spam attack was in effect before the recent drop in transaction volume.
The transaction volume statistics might be a bit deceiving. You have to remember that only a month or two ago, Bitcoin had
a lot of problems with high fees and a lot of people shifted their micro payments onto other Alt coins, like Bitcoin Cash
and Ethereum, because they had lower fees. Since then, most of the spamming has stopped and a lot of people kept on
using these Alt coins out of convenience.
I'm not so sure about that. Bcash network activity has always been incredible low. Ethereum fees are 25-50x lower than they were a couple months ago during the Crypto Kitties craze.
