Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

How can cold-callers know about my general financial status
The cold caller is just a different way to contact you compared to the junk mail that they send. The business  gets information from the credit rating companies for households that meet a specific set of criteria. It could be town, age, home ownership, low credit utilization...Or the exact opposite depending on what they are selling. Some business do sell your data. Grocery store know who buys certain products: parents buying diapers may want to start saving for college; ones buying acne medicine may want to talk about lower rates for car insurance.  When they call via phone they have a different success rate compared to junk mail, but for that business that may be acceptable for their needs.