The problem is that there is no such future for an investor regardless of longterm. If bitcoin is to move in the direction of an optimal medium of exchange then eventually it will need to peel away from its digital gold quality as an inflation hedge. There will be pressure to devalue it. The reason there is little adoption of bitcoin right now is the steady increase in value encourages savings and not spending, its NOT because of the block-size problem.
The belief that you can raise the transaction per second to create a better investment for yourself is assbackwards thinking by people who don't have the ability to think beyond 1 level.
I am going to throw you another curve ball. What if the amount spent on transactions is very tiny compared to the savings piled into investment, but the economic value of those transactions is orders-of-magnitude more valuable than the investment in the tokens. This is very possible. Observe me show you how it is done with
my project OpenShare.