There hasn't been done much research on bisexuality as researchers have often been lazy and put homosexuals and bisexuals in a one big group and then compared the average of that to straight people (not caring if homosexuals and bisexuals might have had scores in opposite directions compared to straight people). But if bisexuality was in etiology a lighter form of homosexuality then we would generally expect in traits where homosexuals and heterosexuals tend to differ bisexuals would score somewhere in between heterosexuals and homosexuals. I think bisexuals tend to score somewhere between heterosexuals and homosexuals in gender conformity but in other traits bisexuals tend to score at the ends, not in the middle.

Homosexuals tend to have a higher rate of addictions than straight people but bisexual people tend to have higher rate of addictions than both groups. Bisexual women score higher on dark triad traits. Lesbians seem to have a higher criminality rate (judging by conviction rate) than straight women (seem to be a big gap between straight women and lesbians) but bisexual women seem to have a higher criminality rate than lesbians. Gay men in other hand seem to have a much lower criminality rate than straight men, but bisexual men seem to have a higher criminality rate than both gay men and straight men. Bisexual women score higher on sociosexuality than lesbians and straight women. Bisexual women tend to report a higher sex drive than straight women and lesbians. Bisexual men tend to rate high on curiosity. Bisexual people tend to score higher on neuroticism than other groups.

Researchers have started to realize that bisexuality and homosexuality might be different and it has been suggested that bisexual people might have some latent trait that makes them more open to experience. That latent trait could perhaps also correlate with more risk-taking, it wouldn't mean every bisexual person would be risk-taker, or that most would be, just a bit more likely, people are still individuals (many of the traits in the paragraph above are things men tend to rate higher on, and it's been theorized that lesbians might have been exposed to more prenatal androgens, so that could be the case for bisexual women too but with a different timing of the exposure masculinizing different things).

But there could be more than one etiology/pathway that leads to bisexuality, in that case these etiologies could have different correlations. Lately research has taken more notice of heteroflexible women which is a relatively big group, so one probably needs to study heteroflexible women and see if they differ from other bisexual women, and if different Kinsey scores correlate with different things.