If you want to fall into an online rabbit hole, search for superyacht security. Those billionaires are spending a lot of money on security and they are totally not keen on getting kidnapped by Somali pirates:

According to a source in the industry, the website Business Insider reported that in a recent foiled plot, an armed pirate group approached a superyacht in the Arabian Sea. However, the pirates were thwarted after the captain deployed sonic weapons and electromagnetic pulse beams that caused severe burns as a countermeasure.

When it was delivered to billionaire Abramovich in 2010, the yacht was valued at 350 million pounds. However, after upgrades and the addition of many modern features, the value of Eclipse is now estimated at around 1.2 billion pounds. The primary factor driving the value of the Eclipse superyacht up is its advanced security system, which includes surveillance radar and a missile defense system along with escape submarines.

Yes, escape submarines (!)

https://scimyst.com/explore-the-ultimate-weapon-on-super-yachts-120251/

Privacy and Security. You’re out there where no paparazzi can take bikini pictures of you. It’s easy to secure so that nobody can kidnap you. And take a look at the interior of those Yachts, they are not cramped. Look at this thing:

It’s bigger than your home. It has its own helipad. It is 111m long.

I really wonder what niche they are aiming for. It looks like a device that is optimized for impulse purchases, that maybe is hanging on a rack in a gas station that you’re buying to quiet down your kids on a long car ride. Or that you pick up in an airport because your phone battery is low. But $164?