TPGK not much worth here?

[infinity235]

Raise preflop.

At the first glance, I tend to 3-bet. MP1s raise might just be a way to protect a weak top pair. Many players wait for the turn to raise with trips, so MP1s peculiar bet probably means a weaker hand than the one he represents. He is trying to knock you and CO out of the hand here. SB is no worry; even though c-betting into 4 players is spewing here, many players do it anyways whether they hit the flop or not. (Just be aware that SB might hold AK and have you dominated.)

However, calling is also a strong option. By doing this, you plan to raise the turn here. A 3-bet on the flop will only knock out players that you have badly beaten, and flush draws and those with a king call anyways. Gutshots calling 2 bets cold make a mistake anyways, so it doesn't matter whether you 3-bet or not. It will not protect on the flop, but if SB calls the raise and checks to MP1 who bets again on the turn, your raise will be much more effective. You then lay 1:5.5 odds to the field, which protects your hand from weak draws in this large pot. Your fear that someone holds a ten is okay, but folding a potentially best hand in a large pot is a mistake. As SSHE states, maximize your chance to win the pot when it is large. If you face another two bets on the flop after you called, however, it'd fold.