yes sure, because i can not spend my time to see coin price every time. i just need right time to sell/buy.
you can always set an alarm to your mobile phone ,
once the price reached certain amount you will be noticed ,
with this way you may will never miss a ingle moment of the down price to buy and the rocketed price to sell ,
the rest are up to your research abouth what coin you have to buy / invested to.
Setting an alarm wont do, coz you wont know if the price will rise up or go down. it really depends on the market on how bitcoins go. if there are more on buying than selling. bitcoin price would rise up, it think. as for me, this is the right moment to buy or exchange some bitcoins because of its lower price than before.