People usualy don't save for fun but because of need and will to have some funds for the rainy days and future that will give them the feeling of security. So, the same thing is with Bitcoins with the added value that Bitcoin is also an investment so with saving Bitcoins people hope for the future profit. If the profit means fun then I save it for the fun.
Never heard of anyone saving for fun, rather people invest and when their investments pay off, they can then spare some to have fun. If you chose to put the cart before the horse, I doubt you would ever be able to have the fun you crave.
Without much ado, Bitcoin is an outstanding asset, in 2016 I don't know of any other asset that its value increased by up to 50%, but Bitcoin rose from a value of about $425 during the beginning of 2016 climbed up to $1000 by its end and for sound and formidable reasons. What else can one look for to know this is one of the best assets to hold for future gains!