Sure. It will find coins. Heck, you can probably get a quarter to well past 1.5 ft. even. Who could ask for more , eh ? And you're "guaranteed not to miss a thing" with a nugget machine (eg.: pinheads, staples, specks, etc....), right ? Meaning you wouldn't miss a tinsel fine gold chain, eh ? Who could ask for more, eh ?
But heaven-help-you if you try a nugget machine in any normal land hunt type location (eg.: parks, schools, relicky locations like ghost towns, stage stops, etc....). Because the bells of Notre Dame will ring on every staple, pinhead, speck, etc....
About the only place I've ever seen someone use a nugget machine for coins/relics is: Beach hunting. And some CW relic guys have adopted them, for places where they have the liberty to dig all (ie.: no iron discrimination).
I saw a few guys swinging high powered nugget machines @ the GNRS. But .... they cut a WIDE BERTH around the couple of cellar-hole locations out there. Fine for middle-of-nowhere , I suppose, where you wouldn't expect to have 100 nails for each conductive target. But for the couple of cellar hole sites going on there, those guys were nowhere to be found .