Well it might look like a French press, but from what I could gather, it works more like a vacuum brewer. It is overengineered for sure, but it does look nice to use. I’m sure it would make some more interesting coffee then french press, since there actually is some pressure on the coffee from the vacuum.
I mean, that would be considering there is no interest at all. Yes if you would put it under a mattress, sure. If you would put it in s&p for instance, even on the low end you’d be getting about 6%. At that interest compounded monthly, you’d be able to be a millionaire at about $1000 a month, or $12000 a year. Still a buttload, but not unfeasible for dual earners without children, depending on where you’re located and in what industry of course.