Tell me why my Crypto Startup idea won't work

I have an idea. Everyone here loves crypto (and have some) and loves startups too.

I want to create a coinbase for startup equity. Translation :you invest small sums of your cryptos in a startup of your choise.

Persuade me that it won't work with arguments based on:

1) innovation - someone already doing this?

2) legal issues - on conversional equity crowdfunding there are limitations and regulations. If we apply only cryptos, are there too?

3) usability/anything else