Some people just like to bet with high risk. I agree that 10% is still rather high but for some it's acceptable. Some think if they risk big they might win big, so estimstion is individual and for some high risk makes more adrenaline and more satisfaction in playing.
Bitbunny you are right, it all depends on individuals! While some people are willing to accept some level of risk, others are not.
Level of risk can be different, and different people will act differently. In this specific case I would not be comfortable risking
1/2 of my bankroll on any risk level! I would choose much less bet, on any odd! It means I would try x1.1 or x11, but I would
adjust my bet to my bankroll! Gambling is not all about luck, there's some strategy as well!