It's impossible to know how high Bitcoin will rise, or if it will reach a ceiling and stagnate. Supply and demand is and always will be the golden rule. We don't know if something beyond Bitcoin will be created and perhaps take all the attention for itself. In the meantime, buy, hold, and monitor the market to avoid surprises... 
And if it's about the market surprise, just be known to it and you'll no longer be surprised if something goes bad to the market. We may never know how high Bitcoin is. But we have an idea and saw it that it can rise for as high as it can be for each cycle that is going to come.
The demand is there and many of the adoptions that have happened lately includes the massive amounts from the biggest financial companies that are now part of our community and this market.