Always bet the flop, people are more likely to call on the flop. With four others in the hand someone most likely caught a piece. Draws will call. You want to bet 2pr hands. There are two straight draws out there.

Suppose it checks through on the flop and a flush draw gets added on the turn and you don't boat...now you can have 5 way, a small pot, lots of draws, hard to build a pot and lots of scary rivers.

Bet .06 on the flop and strong on the turn. Don't worry about scaring people away, they have hands/draws or they don't. Unless you flop top boat/four of kind, then you can wait and let people catch up.