When the 750 came out, they were stolen every few minutes in the Chicago area where I lived at the time: in 1970 alone there were over 1100 stolen K0 reports issued to the area's bike shops by the metro police folks. Today, as they are "coming back" as the all-purpose, great-looking, useful ride they have always been, they are getting stolen more again. Here in Denver, even, which used to be known for NOT having this problem...
I moved my keyswitch back under the tank by the carbs, first thing (and never leave the key in, of course) to make it a little harder to hotwire near the key. I park it 100% of the time with the KILL switch OFF and the steering column locked at minimum, just to slow down a would-be taker. Next step up is to leave it in gear, always a confuser. I also carry a 3/4" thick, PVC-coated, unpickable, double-tumbler plunger locked cable, and it goes through the rear spokes and the engine under the carbs at a minimum if I cannot see the bike from wherever I am going to be. At motels when I tour, it also goes through a guardrail if I can find one, and has sometimes spent the night in my room (ah, Eau de High Octane...).
And then there is the always-loaded, cleaned, and ready pistol on my belt, in my pocket, and/or my boot (sometimes more than one) or hanging near the door at the least. The Second Amendment and I have been lifelong, hi-caliber buddies...

(And my wife is going to get HER carry permit shortly, too!

<< This is me, happy about it...)
There have been 8 attempts on my 750 that I know of, based on its movement and things like the cable wrapped around the rear axle, or the bike lying on its side. People want these bikes, always have. Unfortunately, Honda did not make them hard to hotwire: fortunately, most thieves today don't know a green wire from a yellow one (and, the bikes are pretty heavy, this helps). This is one reason why I offer the coil-killing (but pricey) "Security Switch" on the transistorized Ignitions I build, as just one more "layer" a would-be driveaway thief would have to figure out after a hotwire (honest, that's not a plug, merely my reaction to all of this while I designed this thing for all of us Four lovers.)