The trading value of steem will go much much lower in the near future. Faster than the rate of interest you receive on your steem power. Steem is way over valued imo at the moment and has a ways to go before it goes up and stays up.

So you could power some down while the getting is good, or put everything you can into SP and plan for about 2 years into the future.

If you choose the latter you would need to patient as volatility can be your best friend or your worst nightmare should you scare easily.