The basic theory behind bitcoin mass adoption goes something like this.

Each bitcoin carries 8 decimal places. 1 bitcoin is 1.00000000. This format defines bitcoin's potential for future growth. As the value of bitcoin increases, transactions will move further to the right of the decimal point.

Fundamentals of supply and demand suggest demand can be measured by the total number of end users an application has. If demand is a factor of user base size. Demand could be expected to grow steadily on a path to global mass adoption. Which would in turn inflate bitcoin's price.

Effects of increased investment and speculation are not clearly defined. There is a potential for elevated volatility. And a potential for increased speculation having a balancing and stabilizing effect.

What bitcoin HODL mass adopters are most concerned with is bitcoin's price rising due to an increase in demand. Caused by growth of its user base.