The whole point of this thing seems to be to prove that 21 has actual working technology - the economics of the thing make ZERO sense, way too bloody expensive for what it provides.
I wouldn't even count it as a novelty - too expensive - though some folks buy cars as a novelty 'cause they have more money than sense or more money than they CAN spend.
But it is cool as hell. Even though it's way too expensive, I am sure that it will find its way one day in a Bitcoin museum.
I wouldn't buy it though. For less than a $100 you can get a raspberry pi with the same specifications.