going for broke

delicate dicey hazardous perilous precarious sensitive speculative treacherous tricky uncertain unhealthy unsafe unsound

chancy endangered fraught with danger hairy hanging by a thread iffy insecure jeopardous long shot not a prayer off the deep end on slippery ground on thin ice on-the-spot out on a limb playing with fire rocky ticklish touch-and-go touchy venturesome wicked wide-open

certain definite harmless healthy honest insensitive protected safe secure stable strong sure well

assured