yes you did because selling now is a very bad idea, never sell when after a dump there is a long stagnation phase, i think it indicate a pump that is incoming, sell only after a pump is almost done, and it's hard to know yes but you can usually tell if after the dump that will happen
But the problem is you can never tell when the dump and when the pump of bitcoin will happen. This is one of the problem of investors, looking for the great timing to sell their coins. As of now there is not much movement of bitcoin in terms of dump and pump. Would he wait for another year to build his rig just to ride and sell at the near peak pump? And how can you tell that next year there will be a pump? As long as the person is satisfied to what he bought with his bitcoin, it never a bad decision.