at this level I just don't know if this is ever a bluff. But you're getting 2.5-1 meaning you only need about 29% equity against his range so it might be close with your two second nut outs and a bd fd and bd straight draw.

I think an exploitable fold here without better reads might be correct against this player at these stakes. But I'm sure we can make some assumptions about a shoving range that would make calling ok.

without taking the time to hash out those assumptions I'm going to suggest that folding this is going to win more money at 100 plo. that being said I've had lousy results lately.

it's often a 10 but with SPR i would almost never fold, taking into consideration this guy might be a donk and have KK somehow (yep, i've seen it).

The thing is that button has a lot of Tx in his range also. And he is less likely to random spazz with 2 players behind.
Would not fold if this was heads up, but with button still in the pot, I would let it go.