Being rich by hoarding USDollars or bitcoins is just an illusion: the real wealth is in the goods and services that are produced and exchanged in the economy.

I believe a lot in the sharing economy (apartments, car pools etc) as a way of using resources efficiently, in the optimal sharing economy you don't even need to have money to participate in the sharing economy. Instead you just have a good rating in a web of trust and people trust that you will contribute to the economy later on. Bitcoin would work as the public ledger in such economy, and hoarding bitcoins would not be necessary. The richness will instead be measured by your contribution to the sharing economy.