For me both, I save my bitcoin for fun and also for future. Because in my own opinion bitcoin price wil get higher and higher. I also save it for my future, in that way i can easily get money if there's unnecessary thing happen. And for fun because me and my friend always competing for how many bitcoin we both have.
yeah i think there's still a lot of people treat bitcoin as not a serious investment, they still feel insecure when store their money in bitcoin . due its volatility they think bitcoin could get dropped to the lowest and even disappeared or just go higher to the price where noone expect that. that's why some people buy and hold bitcoin for the sake of fun.