Your security number can be used for other criminal activities too, my advice is to keep your mobile phone numbers out of crypto things.
Not only crypto but any other thing you want to use your phone number for registration. Many registrations demand the use of a phone number, however if using an email address is an option, it should be chosen over using a phone number.
I recall receiving a call lately from some scammers who had registered a new WhatsApp account using my phone number and asked me to provide a code that they would give me while we spoke. They accurately identified the organization I am a member of when they mentioned there would be an online meeting, and that I would need to provide them with that code in order to participate.
I was given the code, but all I did was ask them a question that they were unable to answer, and as they realized I had identified them, they hung up. I'm affirmative they obtained my number during an earlier registration process in which I used my phone number. They were able to compromise the information there and are now searching for victims to fall into their trap.