Top 50 is already a prize zone. You should do everything possible to get to the final table. Yeah, maybe you will leave of the tournament, but here the risk is necessary.
Congratz on ur win mate. I have lost alot of tournaments in that same way shuving it all with Aces, Kings or Queens, and now when i have a high stack and a monster hand i avoid getting in hands with people who can cover more then half my stack. Ofc im not folding but when i raise preflop and i see a monster stack on the table against me i always consider if its worth to risk it all for just that stack. Because if u fold u can always steal a few blinds or bluff ur way back into the game.