i also have 2 1060 on my rigs. And eventhough i knew those cards were better mining Zcash, i stayed away from that. Why? because my investment was to mine ETH. and if ETH failed, i would have left the market and sell my rigs. no doubt. i never trusted other coin than ETH. In fact, i could have built much more rigs for ETH. and i didn't do it. Why? Because first of all i'm not a greedy bastard like many miners here. And 2º because i knew that i was actually harming people that were already mining, and my point was to get enough for me harming those guys the minimum. I entered mining ETH in October 2017
while thats an admirable position to take, and i do understand it (there is a coin i will flat out never mine even if its more profitable simply because i vehemently do not agree with its vision), the bulk of miners are in competition with each other.
but in general if profits are more or less equal i will mine the coin i think is better. and while that may impact the profit of miners who are "true believers" of that coin it increases the security of the coin. so whats good for a coin (increased hash power) may be bad for a miner (increased difficulty). i figure a coins security (ie higher hash rate) has priority over my fellow miners. not that i want them to make less, i just put the coin security 1st. after all if a coin fails due to a low hash rate that allows easy 51% attacks.. well whoever mines that coin has lost anyway.