[linuxkerneldev]

> so that's effectively opening up new easy to get credit vehicles for unsophisticated investors. How could that go wrong?

Not really different than what's currently available and which by the way, is heavily regulated as is the service that Robinhood appears to be offering.

From their FAQ https://support.robinhood.com/hc/en-us/articles/213262686-Ro... :

You can use your full Gold buying power when buying stocks, though sometimes you can’t invest it all in one, single stock. Let’s explain. This is because US federal laws require all brokerages, including Robinhood, to have common-sense safeguards to prevent customers from losing too much money on a single, high-risk investment. Some examples where you can’t use your full Gold buying power on a single stock include leveraged ETFs (which are already leveraged) and newly-IPOed stocks (which can go up and down in price very quickly), stocks priced at less than $3.00 per share (these securities are at greater risk of getting de-listed), and others.