Although the short term price impact may be negative, the side effects of both these sideshows is free publicity for XMR. BTC rally is highlighting the block size issue again, and the ZCash launch is focussing the spotlight on privacy issues. BTC may rally hard from here, or not (not sure how far it is possible for it to go the mess that we just saw with tx delays keeps repeating ), but when the dust settles, hype dies down and smart people have raked over the ashes, XMR will almost certainly gain some new advocates.
As ArticMine said a few posts back :
Identify a real need in the marketplace, and start a business to meet that need. Chances are that you will succeed even if the odds appear really stacked against you
XMR is already here, ready and waiting for people to wake up to it's benefits. Tons of media attention about privacy in crypto is great, and is sparking debate amongst a larger group of people. BTC's weaknesses are being exposed. The fact that we essentially now have a corporate 'Privacy Coin', whatever we may think of it, that is about to be listed on multiple exchanges, lends legitimacy to the concept and will make it harder for govs to take any actions against any single private coin. And XMR will without doubt get free publcity from it all, perhaps even in mainstream media if ZCash keeps the hype machine running (which it will), as it is a natural part of the conversation. This is all good news for the long game.
As for ZCash sucking money from XMR, not sure how that is even possible in the next few months as the coin supply will be so limited. It has to have some meaningful market cap and a decent number of coins in circulation before that can happen. Sure traders will trade it regardless, but the price will be pretty meaningless IMO and likely way above any sort of 'sensible' investment level.
Cool story about The Verger by the way! Thanks for that