It's only okay to be optimistic with the Bitcoin's price. It is okay to picture out that Bitcoin will rise a lot years from now because that would surely be happening. But if you picture out Bitcoin having 50K each before you reach the end of your lifetime, then you're over-optimistic. To be honest, that positive thinking is way too much. We don't know when are you going to die but surely Bitcoin wouldn't be 50K at that point. It's too far from the current price.