It's very easy, just give them some examples of those successful bitcoin business owners.
Most of the successful business owners were holding big capital investment as well most of them were large scale traders and gambling site managers. Another important platform available is to create blockchain based applications which is gonna make big change in the mobile usage. Other than these it's good to accept bitcoin same as physical currency acceptance.
Lots of new digitally mode of payments or for any services and transactions now relating to money were accepted by many now,its benefiting the customer as well the businessman. For the customer for easy and less hassle transactions,same with businessman for attracting more customers knowing their capable of accepting online payments. Same with bitcoin knowing there were numbered of users now, they might got interest on it too plus the features and services bitcoin can offers to them too.