Depends on coin - if I see it being pumped beyond reason I sell most of them, otherwise I stockpile/sell 50%. Then I buy next gpu [so far upgraded my hw from 100 kh/s to 890 kh/s
] and after doing so I farm them again to have between 0.01-0.001% of total supply of coin. Then I let them lay there for better times. Some[or even most] will die, some will survive, some of them will go to the moon in next bubble[I'm looking at you quark]