Guys what u doin with mining coins ? keep or sell ?
My strategy is to keep them until the end of the year and pay the electrity from my poket how many months i can....
But with 9x 1080ti 6x 1070ti and 13 x 1070 i make only like 35$ per day....omg.
This is really not a good question, simply because every miner has different situation on his back at the moment, so good strategy for someone is not good strategy for you or vise versa.
Maybe someone bought his cards 2 years ago and someone 2 months ago, electricity cost perk KW can be very high or very low depending on country or region you are living, coins you mined can be long term good projects or trash for pump that already passed, etc....
Also someone bough all this equipment from his pocket -fiat or crypto- , and someone got a loan to start because he saw opportunity.