If you are an active member or like posting / upvoting or commenting on SteemIt then powerup to SP as your rewards are relative to it.
If you are looking just as an investment, Steem or SteemDollar is good. Both has its own advantage. Steem is the liquid currency and will rise as the demand rises due to popularity of SteemIt. You can transfer it, spend it, or Power Up into SP.
SteemDollar is used for stabilizing the price which represent about $1 each in value. You can hold them and accumulate a 10% return
If you are an active member or like posting / upvoting or commenting on SteemIt then powerup to SP as your rewards are relative to it.
If you are looking just as an investment, Steem or SteemDollar is good. Both has its own advantage. Steem is the liquid currency and will rise as the demand rises due to popularity of SteemIt. You can transfer it, spend it, or Power Up into SP.
SteemDollar is used for stabilizing the price which represent about $1 each in value. You can hold them and accumulate a 10% return