Opponent on BB is unknown player, should fold here on BB vs UTG? I don't think he 5bets here with worse hand.
PokerStars, Hold'em No Limit - $0.05/$0.10 - 5 players
Replay this hand on Pokeit - https://pokeit.co/public/425lmXKfc/r
UTG: $15.19 (152 bb)
CO: $10.38 (104 bb)
BU: $9.60 (96 bb)
SB: $34.24 (342 bb)
BB (Hero): $10.00 (100 bb)
Pre-Flop: ($0.15) Hero is BB with K♣ A♣
UTG raises to $0.30, 1 fold, BTN 3-bets to $0.95, 1 fold, Hero 4-bets to $2.50, UTG 5-bets to $15.19 (all-in), 1 fold, BB (Hero) ???