There is also one thing that people always assume when stating that bitcoin value will always rise, and that's that demand will continue to increase. If demand remains static or falls then the price won't increase over time.
That may be true, but only at the moment. Once Bitcoin gains more and more attention and more so value in the years to come, it would surely be more valuable to hold than it is now. Although, currently, gold and money are more stable to hold as their values do not really change much, it is surely a nice that another market player is emerging that can give newer investors to have their niche in the investment market.