For me it's not a lose. The best strategy is sell at the peak and buy at the dip. You never know what's coming so better to take advantage of the ups and downs. But this is only for people who has all day to monitor the price of bitcoin but if you are a long term holder then there's nothing wrong.
The thing is long term holder is more or less sure to make a profit but short term traders can lose just as quickly as they earn. Personally I don't believe there are many traders that consistently make a profit so I would always advise people to just hold on to their coins.