i wouldn't call it a "long" term investment but as i said for the reason above it is a profitable investment.
and it is not just about faster transaction, that comes from the fact that it has faster block generation (it is about 15 seconds). it is about scaling issue. and the fact that transaction fees are currently getting closer to $1 and it doesn't even have remotely as many transactions as bitcoin has!

But indeed, I think that's what may happen here. I think after the next BTC difficulty readjustment (this week), Bitmain may start withdrawing its hash power from BTC to BCH. This will cause long block times and network instability for BTC, and will give the appearance that BCH is being adopted and that miners are reacting to market demand.

This is way overvalued. Be very careful in speculating this coin.

Actually ETH can't do true anonymity.

Anonymity is something that has to be in the core protocols, you can't build it on top with bolt on scripts or DAPs without some centralization.

As for everything else ETH related, well its all up for grabs Smiley

Moving onto Z.Cash, its the real deal, I've been over that paper a number of times now (bedtime reading Smiley ). 

Don't ask me to comment on Z.Cash v's Monero/Dash/et. al, ring signatures never interested me due to the 3rd party requirement, so I haven't researched them at all.