By definition store of value means "its ability to purchase other assets in the future without rapidly losing its purchasing power" yet bitcoin has in instances halved it's value. So, no not a store of value.
Buying Bitcoin right now involves speculating that others will also see this potential, which is why it’s accurate to describe it for the moment as a speculative asset. The reason buying Bitcoin is a smart bet is that its monetary properties are so good that it has the potential to store a significant percentage of the world’s savings. Once that happens, its volatility will be much lower, so it will be a good store of value. And of course its purchasing power in current U.S. dollars will be much, much higher, which is why it’s a good idea to buy some now.