I think if those who don’t earn so much but still see Bitcoin to be a coin with some great potentials do mean to invest, they wouldn’t be so focused on what price it is for one Bitcoin at the time but, shift their attentions towards what fraction of Bitcoin they can allow themselves to buy and keep accumulating on the long run. It’s the one way to measure up if they ever what to be a part of this innovation rather than have all their attention focused on how high the price have gone. That way, it would be difficult buying!
Talking about the low amount of capital to get started with aside, if not for current massive growth of bitcoin's price. These people wouldn't get interested in investing to bitcoin anyway, so if they are too pessimistic because price is too high, trust me they'd be pessimistic when the price was also low.
So they are just finding excuses and getting too focused on the price, just don't want to invest in the first place.
Only true believer and the brave are gonna be making massive gain, as it does with anything else, those who doubt just gonna be bystander watching other people getting richer.