Yes the coming Bull run will be more stronger than ever and all those who have holded their bitcoin and are still buying more will be profitable as they have taken their position early and wisely. Everyone has different opinions and different assumptions but what will be the real all the time high worth is unknown yet.
If bitcoin price reached to 100k$ then probably other altcoins will also altered in their price to reach the highest price. This time is not for making prediction but this time is accurate for accumulating the necessary assets if you wants to get benefit from coming Bull season.
I think that the most difficult thing will be to predict what price Bitcoin will reach at its peak, last time Bitcoin the price increased 3 times in the year of the previous halving, but later the before this halving, the price increased fivefold. If you follow this trend, the price on average should double. That is, it will probably reach 120 K.