Yes, it is legal to use Bitcoins in the Philippines. If anything, the BSP ruling is a step that allows everyone to engage in bitcoin without fear of being classified as someone who doesnt use traditional currency (AKA the Peso). It is a step towards acceptance. Also, it is a way of telling us that we can deal with bitcoins if we want.
There isn't still the forbidden using bitcoin in philippines if i read the news related to them, so it's still legal in my opinion, we can say it's illegal when there is a rules from the government of the country saying that you can't get the punishment if you're using bitcoin