One way to improve the shoulder holster idea: get some of those buttons made for people with limited use of their hands. They button through the hole but have velcro on the back and a patch that goes where the original button used to be. Looks buttoned but easy to get into and out of.
A more stable idea than the shoulder holster or simple neck carry (both tend to swing, and the neck carry does it far worse) is a chest holster as done by Robert Humelbaugh at Survival Sheaths. Another alternative is a pocket sheath such as the KSF models, the AG Russell Woodswalker, or adding a pocket clip to the existing sheath.
As to your knife choice, the CRKT Minimalist is ergonomic, lightweight, with a remarkably good sheath (most factory sheaths I've tried suck) and inexpensive, so it's good for defensive use if the knife rots in an evidence locker or a sewer. Its poor heat treat--common across all CRKT models--makes it a lousy choice for utility. Regardless of manufacturer, if the knife is intended for defense, it's better if that's all it's used for, because who needs a dull knife when a sharp one will work better to save your life?
Consider the
Spyderco ARK. It's a remarkable bargain for what you're getting--lightweight, ergonomic, and absolutely rust-proof, which is damn handy for against-the-body carry. If I had to lose it I'd be upset, but a $55-65 knife is something I'd pay to replace with the same thing.