I strongly believe you can do both the selling and holding(waiting) of bitcoins, and at the same time grow your holding & make a profit from it.
Yes but i don't think this is the right time to sell the bitcoins as the price has dropped and this is time to hold on to bitcoin and possibly buy more bitcoin from the panic sellers because we are sure that the value will have a pump in couple of weeks or months and once the value is increase then you can do both selling and holding in a 60:40 ratio.
That's correct this is not the best time to sell bitcoins as price is too low in compare to what we have seen in last couple of weeks and the right move should be to buy more coins at this price as there are many panic sellers who are selling their coins looking at the drop in the price so we should take benefit of it and try to collect as many coins as possible.