Going through the released notes, I bet 1 $ that the new "currency" to use at vendors will be actual money, the micro transactions are in motion...that is the next big patch from destiny....no real voice chat, in game clan options or matchmaking....just squeezing money out of you....
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Most MMO style games implement new currencies when patches/expansions come out. This is pretty common. It makes players have to grind to get the new gear instead of just having a bunch of the old currency to buy the new gear.