Men i certainly did somethng like this and did wrong lol. Right now when ethereums price raised to $175 i did sell them and buy altcoins... and the price of the alt went down... a lot... i had to buy some stable con and the re buy some ether now the prices fell again. Well thats the price of learning this lesson.
Of course, each user of cryptocurrency is trying to do something to minimize any risks, as well as try to earn a fairly good income. But it seems to me that there was no need to take any action in the current state of the cryptocurrency market. Only long-term storage of all those assets that you have, can bring at least some result.