I talked to my friends many times, some of them were more willing to listen about Bitcoin than others.
Conversation usually goes like this: I told them that Bitcoin is probably the best investment of our generation. In the end they all always ask me:
"Can you guarantee me that if I buy Bitcoin now it will be worth more tomorrow/next year".
When I reply that no one can 'guarantee' something like that, because bitcoin is not backed by central bank, my friends usually lose interest.
Also, it is still to complicated to buy BTC, to use standard exchange you need to be verified, it is troublesome, considered bad reputation bitcoin exchanges have.
People want assurance and that's something that you can never have. Scammers are using the phrase "100% guaranteed!" on their investments because that's what people are looking for. There's no guarantee about anything in this world. It's not even guaranteed that you're going to live tomorrow, who knows?
You don't need those people. They are probably just going to invest a couple of bucks anyway. No need to feel sorry about them not investing in bitcoins. All those type of people combined is just equal to one whale. But of course some of the whales wouldn't be so interested about bitcoins if there's not much user base.