For me it's better you choose investment because you invest your money or bitcoin you take the risk and that risk had high possibility to earn. While if you save your money or bitcoin you are not practically business minded because you were only wait to your money or bitcoin even you have no do to earn it.
i would also like to choose investment. although saving is also important i would like to save a small amount of money. i will only save a small amount of money for emergency purpose while will like to invest all the remaining as in good business and increase our investment and make some profit, i think in present time bitcoin investment is the best investment from where we can get a good profit in a short period of time.