I agree with Cobra on this. We have toyed around with the idea, in time with increased per coin value the 2.5% will in my opinion be enough to support our donation goals. I'm just praying we don't get unnatural growth as our current per coin price could easily be the next pump and dump as this currency is totally undervalued.
Money is nice but everyone be careful of feeding the sharks there will only ever be 299 mil coins and at these prices it would be a prime p&d target. Just let's use our heads when selling.
I am buying and mining it myself, I am not a shark, and primarily interested in the value of this coin long term. I am pretty dedicated to the foundations goals, and making sure we end up meeting them. A little economic self interest to help a fund science though is not a bad thing.

I consider what I am buying as an investment into the work we will be doing for the foundation.
I see pump and dump as destructive, it will hurt our mission, but the point is I will be keeping an eye out even if I am a small economic force.