I actually don't think scalping is a good strategy in a bearish market because there isn't that much trading volume going on.
You need to have a lot of trading volume to take advantage of the small and numerous gains you hope to achieve.
Without the volume, prices become stagnant and fall.

Also, as others have pointed out, it is very risky.
You could end up putting all of your capital into a coin that just doesn't move and all of those gains are negated.
You need to realize, in order for scalping to be successful, you are willingly giving up huge profits for tons of smaller ones.
All of those small profits could be swept away by one wrong move.