users will probably have 10-100 TB HDDs in 6 years.
Why Pollyanna, what a nice rosy prediction you have there. If you want to make an altcoin based on hoping for the best, GLWT.
But here at Bitcoin, we plan for the worst.
We are building high-powered money capable of surviving world wars and global depressions, not a gimmicky fancy Visa to give you leverage over the latest fiat bubble.