So will it start to surge and reach above 20000 again in March,2019 or April,2019?
Price history should be disregard on this matter. It's not a good basis to predict or speculate what will be the bitcoin price on a certain months or so on.
It will just lead for expectations and if don't happened, people will just be dissapointed.
Just go with the flow and let the process sink in without expecting too much on it. Focus on the usual accumulation so that when your expected bull run happen, you will have some pretty filled stash ready on their execution.