I experimented it on my father who never had a bank account in his entire life. He even doesn't have a smartphone. But, he told me that he'd be investing in Bitcoin a 5000 INR monthly and said the responsibility of return of his fiat would be mine if anything goes wrong. I accepted and got the first investment from my father and updated him yesterday that his investment had already increased by 5%, he became super excited and asked me to return back the profit. I had to make him understand a lot of things, but it was fun. I hope, he'll understand Bitcoin a little more slowly for he's at least 60 year old traditional very less educated Indian.