IMHO STR is unsafe investment. Just read the news from cryptocoinsnews and I sold all my Stellar.
https://www.cryptocoinsnews.com/opinion-earth-going-ripple/Quoted from the article:
Jed McCaleb (Ripple founder) and others in the Ripple Labs had a dispute, so he left to fund a ripple clone called stellar and threatened to sell his 10 billion ripples at a market rate. They are now in a legal battle so that 10 billion has not yet been sold. Moreover, a flaw was found in stellars consensus system in 2014, which is similar to ripples with stellars chief scientist concluding that the stellar system is unlikely to be safe when operating with more than one validating node, [because] when consensus is not reached, a ledger fork occurs with parts of the network disagreeing over accepted transactions. Ripples chief cryptographer concluded that stellar (created by ripples founder) had incorrectly implemented the consensus system and that there is no threat to the continued operation of the Ripple network.
As per my opinion, for now STR is really at unsafe, price is still correcting, or maybe corrected a little bit already, I'll just invest in this coin when it is already stable and rising healthy, not one time big time.