First of all: no one should ever invest more in bitcoin/cryptocurrency than they can comfortably afford to lose. When holding that principal, there would be no necessity to recover from a loss in bitcoin investment, so hopefully this is not the case with you. That said, other ways how people can deal with losses is just keep on holding and not selling, because a loss is not a loss until one sells; most people that choose this approach are people that believe in the long term perspective of bitcoin and have enough faith in bitcoin to not be demotivated by the current, possibly only temporarily lower price. Other people have been cost averaging at these lower price levels; this way their average cost price is being lowered, so they will be in profit sooner when the price goes up again. Another solution some could benefit from was selling on the way down, but buying back in at various lower prices, which would increase their amount of Bitcoin without having to spend more money (this last method is only practically executable for people that have experience and good knowledge about trading).