You cannot power up SBD. Only Steem. If you want you can sell your SBD for Steem and power that up. Nobody knows what will happen. All we know is that we all want more Steem Power. ;)

I will wait with my SBD and see what happens. I might loose money that way. I might gain some. Either way, I earned it all here so no hard feelings if it doesn't work out for me.