Well he/she can still buy at cheap price just like today so the OP has made the right decision to dump everything when the price is still high.
If OP buy bitcoin at low price and sell it at the huge price but when OP started this thread the value of coins are too started to dump that is why i think he generate only small profit but still he is lucky to sell it at early.
And that's how everyone should really be, take profits, don't be emotional and silently accumulate bitcoins when the price is at a discount. And wait for another bull run before you make your decisions to sell-off and then rinse and repeat.
We have different point of view while we investing, some of the investors have a target amount of income before selling their coin, and there are investors even small amount of profit they always sell their coin to make the circulation of his capital and income will be more faster than holding coins for long period of time.