I think many of them feel bad about not diving in when bitcoin was <$1 so they come up with excuses too convince themselves bitcoin is a bad thing.
That's probably true to a degree. I've been in the PM's for about 3 years, mainly silver. I looked at bitcoin about a year ago and dismissed it. Recently I've looked at it again and having studied the metals and currencies extensively I have a new appreciation for bitcoin. The philosophy and goals of it are very worthy of merit and I'm a strong supporter of it and want to learn more. The biggest downfall for the "outsiders" (not in bitcoin, NO technical wherewithal [which is cool]) is trying to understand it.
I think first you have to understand the nature of money and why people use it; then you can understand bitcoin. It's quite an educational process and there's a long way to go. I've been teaching people a lot about currencies and I've made them money in the markets. They listen to me about bitcoin because they respect me. They listen to me the same way a 4th grader listens to a Phd. Interesting but very confusing!
So I'm not discouraged that I didn't get in a year ago (more bummed). I'm still going after this aggressively now and will teach people about it the same as I did with the metals.
What will keep people from this now is the cost of rigging and understanding why they would convert fiat to bitcoins to spend. Why not just spend the fiat? That's the challenge.