Unless you have added your details to a site for investing and have allowed them to share your information I doubt its related.
Thats a lot of leg work for an agency to do just to see if you would be interested in spam phone calls
There are rules about data your name and number is data
Think it’s gdrp, basically They must have your explicit consent to have your data
Sure don’t I know well. I work as a data scientist 
GDPR is indeed the one! I’ll be sure to ask next time.
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Another one this morning from Austria. I didn’t catch who they said they were calling from. But apparently due to my trading crypto my information was breached and could happen with trading stocks too. I just told them I don’t trade anything and he left me alone. Another number blocked!