Most people buy BTC and hold it. They see it as the 'new gold'.

BTCZ as currency - mine it and exchange it for another thing. Dont hold it. When I bought BTCZ it had a supply of 500.000.000 coins, now it is almost 4.000.000.000.

Inflation in 1 year and few months ~ 800%. For example, if BTCZ reach 100 satoshi again its market cap will be USD 15 million (higher than GRIN today). Inflation is a karma.

Every coin is a currency. In this case I mean 'medium of exchange' to differ from 'reserve of value' (hodl).