The upper and lower bounds should be taken into consideration for the next bull runs.
It may well be the case that the next bull run exceeds these limits due to mass market adoption.
At this current time Bitcoin has seen an unforgettable year and with more and more people investing in this currency, it may well be that the upper bound we see here is used as a lower bound prediction for future bull runs.
It is interesting to note that the fibonacci sequence depicts a natural expansion and this could be predicted for the next bull run if the market/coin does not experience any bad press in the coming year.
The businesses involved in this industry have made a lot of money this year and I can only see them investing more into the industry as a whole to make it go even further.