For those of us living on the right side of a relatively stable rules based society where we have reasonable expectation of personal property rights, it is not useful.
For those either on the wrong side of the society (eg. Source of income is what the society defines as crime etc) or living in a society where your wealth (possibly acquired through corruption) can be seized without recourse, it is potentially a useful way to store and transfer wealth in a way that is difficult and expensive to interfere with or detect. This is a real use case though possibly not a morally defensible one to most of us.
The other theoriticical use case of having a form of liquidish currency that is not devaluable at whim by governments has not come to pass due to speculation and volatility.
The rest are either speculating OR selling shovels to the gold diggers.
For those either on the wrong side of the society (eg. Source of income is what the society defines as crime etc) or living in a society where your wealth (possibly acquired through corruption) can be seized without recourse, it is potentially a useful way to store and transfer wealth in a way that is difficult and expensive to interfere with or detect. This is a real use case though possibly not a morally defensible one to most of us.
The other theoriticical use case of having a form of liquidish currency that is not devaluable at whim by governments has not come to pass due to speculation and volatility.
The rest are either speculating OR selling shovels to the gold diggers.