I predict that on the day of the halving in 2020 the bitcoin price will be $1666.
if bitcoin will be alive til that day, i think that price should be around 2000$, of course it might and probably will be larger than that, maybe like 3500$
You are right that in 2020 we can expect the price at $2000, but at the point of bitcoin's survival you are at wrong, bitcoin is becoming amore stronger currency with each passing day and it is sure that it will be among us till the end of the day.
i think it is too early to predict about the bitcoin after halving in 2020 because the halving has passes recently, if we predict the incoming having in 2o2o from the result of previous halving i will like to say that there will no special effect on the price of bitcoin and hope that bitcoin will be trading above 2500 USD level.