Excellent thoughts. I often think this when i see everyone striving so hard for some ideal that can disappear at any point.
As for cryptocurrencies - as early adopters they will make us materially wealthy. But in time we will spend them or something better will emerge and itll change. Everything is always changing and in flux. We just have to trust ourselves enough that we can create abundance
I think the first step in disownership is the sharing economy that'll be enabled by cryptos. Second will be the "background-process" transfer of value, and the ability of any values to be transmutated to any other values (think of a matrix of values per person, enabled by a world computer, and a transmutation device like BTS). It's not disownership per se, but it's ownership manifested differently.. more fluidly.. hmm