It's false (at least here in the UK) that investors blacklist companies that have raised equity crowdfunding. The trend is going the other way: towards crowd equity rounds being anchored by venture funds and to VC co-investment.

See eg http://lcif.co and https://www.crowdcube.com/pg/not-just-the-crowd-1712

Re: edit, absolutely. Crowd investment into a portfolio / fund vehicle is a great idea. Likely to be more like a quant fund / index tracker though, rather than professionally managed -- because who wants to pay 3% annual fees. And what would you logically track? AIM or crowd equity platforms because they are your signal.