Plan for a session you cannot predict
The 7x7 grid of Chicken Drop does not show when the next BONUS chest will land, and nobody can predict it. How often the Free Spins round comes is not known in advance. The result of one session is random, and the RTP version only sets the return over a very long run.
Two RTP versions of Chicken Drop exist, and the game rules are the only place that names the version in play. Read that section before your first spin. The version sets the long-run return across many rounds, and it says nothing about what one session will pay.
Up to x5,000 your stake is the highest win Chicken Drop can pay, and the ceiling is reached very rarely. A ceiling shows the largest possible payout, not the usual outcome. No bet size or pattern of play changes how seldom it is reached, so read the figure once and then choose your stake on other grounds.