Coin doing OK so far.
Will be nice to see it strong around 700 sats and not just 'so-so' as it looks now. Regarding biggest wallet 99.9% of the time its Bittrex, also they will have the largest number of wallets. So do not sweat it.
Multipools were ok in the early days of Blackcoin, but no a days a waste of time in my opinion, for the little reward you get, electric can cost nearly as much as what you will get from mining on a multipool.
This coin need to get the ball rolling quickly, there has to be some good development/progress made in the next week or there will just be a steady decline in price. I am surprised it has held in this region now '700 sats', so thats quite encouraging, but it seems everyone has bought what they wanted and are now just waiting to sell.