Yep, as I said, "collectible" bikes are the preserve of professional bike thieves, not crack heads.
Ever since my wife's car was stolen from a shopping centre car park I've always used steering wheel locks on my cars, they're not that hard to defeat, but they provide a visual deterrent, so most thieves won't bother with my car, they'll just move on to the next car that doesn't have a steering wheel lock fitted. I haven't had a car stolen since.
BMW used to provide a really good cable lock with their "R" series bikes, that fitted inside the top frame tube when not in use, once again, it wouldn't be too hard to defeat for a pro, but most thieves would just look for an easier bike to steal. I've got a big "Rock Lock" U lock that I bought 25 years ago, it's another visual deterrent, but it's a big heavy thing, and useless unless you've got side cases or a top box to store it in.
And of course, what's stopping a drunk or drugged dcikhead from just pushing your bike on to it's side and damaging it, if he can't steal it? A friend of mine parked his BMW K1100LT outside a gun shop. When he took off his helmet a druggie sidled up to him and asked him for money, and my friend told him to piss off. When he walked back out of the shop the BMW was on it's side, which resulted in $3K worth of damages. Sadly the scumbag was nowhere to be seen...........
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