... I myself struggle to see why an average user (someone like my mother) would want to use a decentralized service rather than dropbox to store compilation of vacation pictures and videos (or whatever she stores).
By 2005 or so, it will become clear that the Internets impact on the economy has been no greater than the fax machines. Paul Krugman, 1998
"640K ought to be enough for anybody. Remark attributed to Bill Gates, 1981
Your inability to imagine how a technology could become important is a bad reason to believe that it won't.
And just to be fair, I originally did not believe PC's would become popular. Who would pay thousands of dollars to store recipes and manage their checkbook? I was completely wrong and I'll never do that again.
The key is to imagine how it
might be used and estimate a potential value from that.