well we almost reached a trillion last year but for this to happen at least 20-30 trillion bitcoin capitalization for this to happen.
but of course we must not lose hope as I am holding for this to happen , but also I will be contented if bitcoin just take 200k in 8 years time from now.
Maybe it will occur 4 to 5 years from now. Those who assume for $1m or even $500k for btc are I think going to be itchy to sell when they see btc touch that levels although they can always buy again at the dip and hodl for another higher price target.