It is impossible for anyone to know the price of bitcoin in the next decades since bitcoin price is unpredictable and past record is not a guarantee that the future will play out the same way.
Your absolutely right and thanks for pointing that out for Dailyscript and other investors who might have misunderstood that part. The probability of knowing what the price of Bitcoin is 0%. We can analyze and with our analysis make predictions on what it may be. Either being idealistic or realistic but all is full of speculation. Our expectation may come through at the end of the day but that doesn't mean we were certain of the price of Bitcoin in the next few years. True investors will know that the value of Bitcoin would worth more in the future, the price is unspecific but sure its going to be worth more in the future.
It is true that we can't know what the price of bitcoin will be in time coming but even though we are making speculations based on it's current price movements and it's price activity in the past, but it is also good to have some understanding about some of the characteristics and factors that leads to it's price movements as it will help to evaluate if the price will likely go upwards or downwards in the future. Speculations are not just mere guesses as it may seem but combination of both present and past price performances which even if it is not accurate in the future but it can be close to being accurate and this speculations are also what gives investors hopes and confidence about their investment.