The strategy certainly works but only on quality coins and not dead or weak coins. Although I do not understand why people sell cheap and at a loss, let's just accept that fact and take advantage of discounted quality coins.
I agree, a lot of good tokens are sold very cheap, as if the owners of these tokens really need and live there for just a few dollars. Especially those that have not been listed and they sell it at FD. I personally hold more, especially when the market is not so good now