yes i am also agree with you that it is good to save bitcoin instead of investing it anywhere else or using it for shopping etc, because the price of bitcoin is expected to increase more and more, and in near future its price will even cross 1500 USD level.
I can see investing Bitcoin to produce Bitcoin is much better than saving it, though saving Bitcoin is much better than spending it to some shops to buy something when fiat currency can do the job.
Saving money is never for fun purpose since if that is the reason, we can just see our saving be spend on something else, unlike being saved for future purpose, we tend to hold it for very long time so that when we sold it, it will elevate our status of living.
Investing BTC to produce BTC is much better than just holding... Especially if you are investing in something you can withdraw your money any moment, so you don't need to wait a lot of time until you hit ROI. This way since you started the investment you are already making profit, don't need to wait days, weeks or even months to be able to withdraw some profit and wait maybe years to hit ROI... (or in cloud mining case, never).