My own guess is there is a 50% chance of it ever acheiving $20k, and then maybe not until 2020 at earliest.
You realize that statements like these are really conservative, and very long term bearish about bitcoin... which causes me to conclude that you have some lack of appreciation for bitcoin's potential upside.
I do agree with you that the higher the expected future price, the lower the probability that it is going to happen, but it seems to me that when you use words like "ever" in your prediction, you are attempting to predict too many legs in a chain of future events that you have to be nearly completely speculating about since it is nearly impossible to accurately predict more than a few legs into the future at a time... and the further out you go the more any prediction is going to be based on a lot of factors currently unknown.
Hopefully your bearishness is not rubbing too much off into me...
