The silver coin we're launching this year does not contain a denomination by the way. It simply has a Bitcoin logo and the silver oz marking.
Brass is imo not the way to go. Sure it's cheap but Denarium has carried the torch from the original physical coins since 2013. This should be a luxury purchase and with that luxury precious metals should be the only thing you mint. The gold parity coin is beautiful and many will cherish this for decades.
All I'm saying is don't cheapen your brand, you know this is not a need based purchase... it should be a symbol of achievement for collectors. Platinum and White gold would be great to commemorate when BTC breaks 10k usd.
As a loyal customer hopefully you take into consideration my words. If you want to mass produce cheap physical coins create a sister company and new name and market them to the masses. Keep Denarium name in the luxury zone.