You are probably not part of the capital class, even if you have a lot of money. You're invested in doing your own security and don't publicly advertise whatever financial power you have in a way that might make you a target.

But realistically, you could have John Wick levels of combat skill and you would still have yawning holes in your security. You have to sleep and you can only be in one place at once, so there is only so much physical property you can fully protect. Wealthy capitalists outsource their security and mitigate their paranoia by dividing full awareness of their security surface between compartmentalized vendors, each of whom has to assume they're under surveillance by one of the others. If you are personally wealthy, congratulations, but I'm gonna guess you live somewhere with high public safety and never worry about your lawyers or accountants taking up with kidnappers or extortionists.

The capital class is not just about having a lot of money, but being able to leverage it in the acquisition of political and social power. If you have to conceal your power, do you really have it?