While it's very hip to make fun of crypto bros, this isn't unique to crypto. You can easily approximate the net wealth of any company owner in the EU for example, since business registries are open (who owns how much of what company) as well as yearly financial statements (how much are the company's assets worth in a fiscal year). This isn't unique to the EU, it's simply the market I'm personally more familiar with, but I hope you see my point.
What makes crypto unique in this setting is that it's easy for the kidnappers to receive ransom in a way that's very hard to trace back to them after the fact.
What makes crypto unique in this setting is that it's easy for the kidnappers to receive ransom in a way that's very hard to trace back to them after the fact.