if a business decides to accept bitcoin as payment or collateral for a loan, then they will have access to a wallet(which can verify messages).. so they will know enough about bitcoin to participate by just using most wallets..so not really a problem that needs solving
Correct. If they plan to somehow recover those bitcoins should you default on the loan, they will need to have basic knowledge of how Bitcoin works.
Anyone who will trust a third-party who tells them Mr. Joe is worth xxx amount of dollars in Bitcoin is not doing very shrewd business.