That's true, finding someone with 10k is not as easy as picking a person at random, but it is as easy as driving to the right parking lot and picking a person at random.
With crypto, no bank or other middleman involved, it's like stealing physical cash/gold/diamonds from someone, if you know they have it in their possession, so violence can be a lot more successful at coercing a change of possession.
Crypto? It's wild, and people think it's wild.
The distinguishing parts are things you don't want: easily corrupted, grifted, cheated and otherwise duped.
Someone else made a great mention though: Coinbase didn't just serve the US. For the vast majority of countries these amounts are more than the yearly disposable income of a typical household. From that angle the numbers in the stories make a bit more sense.
Also, people do point guns in people’s faces and force them to pay them via Venmo or Cashapp. Google ‘Venmo robbery’ or ‘cashapp robbery’ for plenty of examples. Pointing a gun in someone’s face for $4M in crypto is a lot more lucrative.
I wonder why, select a person completely at random and by median you'll get just as much from what they have sitting in their checking account. Select a nicer area for an order of magnitude more. That's not encouragement to go assault people in their homes or kidnap families... just confusion.