No, this is the one feature i love about ETH, ETH won't lose its valuation when it reached to the new target.
The market value of the ETH is little down now-a-days and that it will keep on fluctuating in the days to come and that it will remain the same due to volatile nature of ETH.
However, there is nothing to be worried about at this very moment and you need to stay calm all the time and you need to hold all of your coins till the time the market value starts to rise once again and you can manage to get some greater profit.