I think the tariffs haven't been priced in.
I don't think they can be priced in, since nobody (including officials in the white house) knows whether Trump is playing a head game with the rest of the world or if he's actually going to stick to the numbers he's spouted off. By the way, I'm not exactly sure who would be pricing in what right now. Retailers? Don't think so. Stock market? Yeah, but every time Trump changes his terms the market just gets more volatile as it adjusts.
IMO Trump is doing his Art of the Deal thing where he lays out extreme numbers on his proposed tariffs so as to leave a lot of room for countries to bargain. I think it's insanity, but that's just me.
Stockpiling isn't a great idea, depending on what stuff we're talking about (and you didn't clarify that, OP). On the other hand, buying up items that have a high chance of being hit by general inflation isn't irrational provided you've got the extra dough and storage space. I don't think the time has yet come when we need to start rapidly filling our bunkers with guns, drugs, porn, and toilet paper. But it's a-comin'.