Outside money will only come when we make new ATMs, not when we make a new ATH. It's extremely difficult for people to buy Bitcoins, and if we make it easier more people will start buying. When people find out they have to submit scans of bank statements and passports to dodgy exchanges they give up.
Most people want to buy with Paypal when they start off, but if they are lucky enough to find a seller it's usually at double the going rate. If there were ATMs withi easy travelling distance everywhere then more people would start buying. Newcomers just want to go to a shop and buy Bitcoins with cash like they do for everything else (either that or use Paypal).
Having only ever used exchanges before, I used to think it was hard to buy bitcoin. By hard I mean,not really worth in terms of fees/commission unless you were buying a reasonable amount (say $1000+ I'm UK based so I have to do a SEPA somewhere which my bank charges £30).
The other day though I wanted a little bit of quick cash, so I thought I would try localbitcoin. Took a minute to register, fired over a few bits, 6 confirmations later a set up the trade with an 'online' trader, 10 mins later money was in my back account.
So now, I am quite convinced it is no longer hard to buy bitcoin in any quantity.