[cb18]

Because they find them useful for transferring wealth (see the remittances market: people no longer have to pay 10% or more to Western Union and banks),

Are people actually using bitcoin for remittances anywhere on a large scale? It seems the hassle of converting to and from bitcoin in the areas remittances are typical doesn't outcompete the X% fee until bitcoin is much more widely accepted.

If bitcoin was accepted everywhere or it was perfectly easy to convert to another currency, yes it would be great for remittances, but as things stand what advantage does it have in most cases?

Also, western union uses computer networks too, they don't actually physically transport cash.