I don't believe in these predictions. In 2018 they were saying that we will have a new high by the end of the year. In 2019 they are saying the same thing.
I know that this prediction by Draper is more of a long term one but there are many positive predictions as there are negative. We chose to believe the positive ones because we want Bitcoin to succeed that's all. Try to be objective. 50 thousand would be a big achievement for Bitcoin even in the next 2 or 3 years.
There is a statement that thoughts are material.If the majority will believe and constantly think about the high price of bitcoin,then it will be so.But I believe around the should be common sense.And he suggests that the price of $ 250 000 is simply unrealistic.
It's not unrealistic if you factor in the fact that most bitcoins held today will be in new hands.

Now Draper has so many that I'm sure he will still hold plenty until he dies, but he is a very rare case.