Since you emphasize about "wallet address owner", have you checked
https://memo.cash/?
so after this if any user give any advice or talk or information , people can know how valuable this information by there Funds or holding time or vaule in verify address.
There's no correlation between quality of information and funds of an address.
User can create profile with there wallet address ( user must verify BTC address by sending small Sats amount to platform BTC address )
First start with BTC addresses ( later can add more blockchain)
You can verify BTC address with sign message.
we can add user can verify account each month ( send sats amount to platform wallet address ) for secure and assure that they own that address.
Sign message also works in this case.