How does bitreserve fight bitcoin's volatility

I don t get how bitreserve is going to fight bitcoin volatility. If you need to lock your bitcoin for a while and if the service exchanges your bitcoin immediately for FIAT and invest that FIAT into, say bonds, you end up with a promise to get back the unit price of your bitcoin at the time of the deposit but you do not actually use that bitcoin in real life with a stable unit price.
So bitreserve is just a bitcoin investment program…

Nothing to do with a robust mechanism to pet its price…