I want Karma to be visible and the trading volume to increase.
you probably wont get this at the 1-5 satoshi price mark regardless of the block reward.
the price or volume is not going to magically skyrocket because the block reward has dropped.. that has NEVER happened in the history of this coin so there is no reason to think it will happen now.
so in my view the correct move is to not even bother with a BTC market until the price is stable enough to handle it. (this would be a market cap closer to 2 million dollars)
fiddling with exchanges will not change the volume being traded by much... volume and price are directly related to market sentiment. if you want the volume of the coin to go up, its really simple, you just have to grow the community and be more active in the community.. then your efforts will pay off.
again look at Mint.. is it suddenly trading through the roof now that the LTC market is closed?
Mint is PoS, is it suddenly more popular now because PoS is in fashion?
Karma is now on quite a few exchanges.. has that done anything significant to increase the price or volume?
I would argue No to all 3.