Depends on the type of tournament knockout, freeze or there is the possibility of re-entry. And also from my stack and skill, the ability to play postflop. The main thing is the goal that I pursue. Some opponents fold if they see an all-in with UTG, others, on the contrary, consider it a weakness (that is, the player does not want difficulties on the flop and bets all-in with AK, AQ). Sometimes in the short stack betting on the flop is considered a tricky move and a desire to involve other players in the game with the nuts in hand. But in this case, there is a risk of seeing a set from the opponent, who will call the bet with a pocket pair. This is the beauty and diversity of poker, because each situation is special and there is no universal unambiguous answer.