In actual we should not convince any person for such things because the main reason is that people always think that if someone is teaching you something then surely there is advantage for that person also , so keep himself away from his and also don't care what he is saying .
So here much better to show off of your success in this field and tell them clearly that many banks are looking to use bloclchain technology Because this technology is more secure than banking system , so its future is much bright and also people are day by day entering in this field to make lots of earnings and also making , so if you want to do something big then surely you should do investment in this field and also you should understand this system that how it works before to invest .