Maybe to add public 2FA related to users BTC address. So everyone should know the phone number of the Bitcoin address owner. SO other people can direct contact between themselves.
You got enough opinions here. Your idea is terrible and you better turn to something else. Here is no space for another "talk" project, especially not for paid service, find something more unique.
Bitcoin is synonymous with anonymity, you want to ask that people discover themselves there and still have to pay for it.