Yeah, putting sbd etc into sp has a really great return on steemit. I don't like to put all my eggs into one basket so to speak. This is not that I'm second guessing steemit, but it is always a good investment to have diverse options. For example, I also invest in gold and silver, the new and smaller/cheaper "shit" coins, as well as powering up my steem and buying pieces of dash, monero, ripple and so on. You can do a great deal of trading on only a few sbd.