Well, it's the right approach not to take bonuses if you're not sure you can fulfill the wagering requirements.
As for bonuses, it's worth noting that betfury used to have a lot of free bonuses. In particular, it was possible to collect a large number of BFG tokens from free boxes.
But it is not easy to collect BFG tokens from free boxes. I tried daily but didn't collect much. But I will not stop collecting that because I know that it will depend on when my luck comes.
So taking the bonuses will depend on how we feel about the requirements. If it is easy for us, we can take it or we can leave if that is difficult.
No one can ever be sure they will complete the wagering requirements for any bonus... no matter how difficult those requirements are. Even x1 wagering can go sideways if you are having a really bad day...
Trying bonuses can be fun... we get more money and we need to play & wager a lot. Even if we win big, we need to stay on the site and play! To finish the bonus successfully, we need a lot of Big/Mega/Super/Epic/Sensational/Colossal wins... and that happens from time to time, maybe once in 10-15 times if you are lucky.

Good luck to all players!