Saving of bitcoin may lead one to profit or loss it can not be predicted because its rate is changing and may increase or decrease. But saving for future is good thing so saving of bitcoins is good. 
That's true bitcoin can be the best investment for future as price is increasing at a moment and once it becomes more popular its price will go even higher so try to collect as much as you can as in future it will become more harder to get small portion of bitcoins.
I'm still not too sure to saving bitcoin in large numbers, I'd always swap its 70% in FIAT savings, still uncomfortable with bitcoin fluctuations, I hope I'm wrong about that. I believe more in bonds stock, property or gold.
You have more faith in that only because they are surviving since long time and comparatively bitcoin is still new currency and new form of investment so people don't have that high level of trust in investing their money in bitcoins but a part of wealth should be invested in bitcoins as if bitcoin performs well in future it can bring good profits.