Yes ofcourse, i would love to save my whole money in bitcoin and wait for 5 to 10 years to grow my money. this is a good question you've got. i will recommend this to my family also about this matters. coz they know that i'm saving my money thru bitcoin..
its profitable to save for a long time because bitcoins prices are on the ever increase ride and no matter how it tumbles it will rise back up again and so you ll not loose if you invest into it in the long term.