Should I sell half my LAC stock then buy back at the next inevitable dip?

I've got ~100 shares in Lithium Americas Corp (LAC) and I've been monitoring it over the past year or so and seen up to an over 100% increase, as well as up to a third decrease.

I don't gamble with my stocks – just hold really. Tend to buy a bit every month and just leave it. But the potential volatility (in the mid term) means I could increase my holdings.

Anyone got thoughts?