Not much of a store of value if it drops 10% in 1 day. Thats HUGE - definitely not peanuts.
I think you have to look at things from a different perspective - short term fluctuations don't harm anyone's long term store of value plan. Point is that as long as the value of your coins is going up over a longer period of time, that the fluctuations we experience every now and then won't impact the value of your holdings at all. Important factor is that a store of value is meant to hold its value over a longer period of time, and that's exactly what Bitcoin has been doing throughout the years. In addition, it gave most people a thick fat bonus on top of that.