I don’t think you have the correct picture of what the US “accreditied investor” laws are about.
Anyone can invest in publicly-traded companies. The law prevents unaccredited (i.e. not rich) investors from investing in private companies.
A company has to go through a number of processes, such as disclosure and underwriting, when it goes public. These processes effectively make it a much safer investment vehicle, amenable to purchase by pretty much anyone. A company that hasn’t gone public hasn’t gone through these processes, and therefore might just be a huckster’s sham.
For a look at what it looks like when private companies are allowed to raise money from the public, don’t look at other countries (which have similar laws) or at Bitcoin (which nobody but rich people even understands.) Look at early Kickstarter, before they put in more stringent disclosure requirements; and look at Indiegogo, which still doesn’t have such requirements. Especially look at projects that started on Kickstarter, were kicked off for not meeting the disclosure requirements, and then went on to raise money on Indiegogo. You know what percentage of those are scams? It’s not small.
Early US stock market investment, before the requirements to IPO were made stringent, look a lot like Indiegogo. Anything and everything was up for investment, without examination. Many people did lose their livelihoods.