I am sure all investors are watching this saga play out in the...

I am sure all investors are watching this saga play out in the US. While Regulators scramble to react to try and contain what appears to be a run away train it is going to be hard to put the Genie back in the bottle IMO. They have turned a blind eye while the top end of town has got away with blue murder so trying to protect this group will have political implications with the change of administration.
This article from the New York Times explains that Robinhood more likely had trouble raising the required capital to cover its exploding user group and is why I think it should be of interest to NSX given the flykk ecosystem announced by ISX in their 4C.
"The surge in trading forced Robinhood to raise cash. As waves of investors poured into the markets, Wall Street’s central clearing hub, the Depository Trust and Clearing Corporation, demanded billions more in collateral from brokerages to shield it from the volatility. Robinhood, which had already drawn millions from its credit lines to meet margin requirements, turned to existing investors for additional capital so it wouldn’t have to impose further limits on customer trades.
A more detailed explanation: Brokerages post money with the D.T.C.C. to cover customers’ transactions while they wait for the trades to settle. With such a big surge in trading, the clearing hub wanted more assurance: “It’s the D.T.C.C. saying ‘This stuff is just too risky,’ ” said the Bloomberg Intelligence analyst Larry Tabb.[12:55 AM]
Other online brokerages also cited the D.T.C.C. as a factor in decisions to impose trading restrictions.
Robinhood faces a loss of confidence from customers. After becoming the venue of choice for small investors, the app risks alienating a core customer base — and feelings of betrayal over the trading limits may be harder to address than annoyance over technical outages. (Small groups of protesters gathered in New York and outside Robinhood’s Bay Area headquarters yesterday.) “Brokers are now ‘protecting’ customers as a facade so that they can appease their institutional backers,” one individual trader told Bloomberg. “The entire community is outraged.”
Online rumor-mongering that the trading limits were done to help Wall Street titans — which Robinhood denies — isn’t helping the company’s case.
It’s also feeling the heat from Washington. An unlikely mix of lawmakers — including Representative Alexandria Ocasio-Cortez and Senator Ted Cruz — accused Robinhood of imposing trading limits to help out hedge funds caught out by the retail trading frenzy. The heads of the Senate Banking Committee and the House Financial Services Committee called for hearings. It poses a big challenge for Robinhood’s policy team, including its chief legal officer, Dan Gallagher, a former S.E.C. commissioner."

If you read the ISX 4C you will see how instant payments via the flykk system aligned with Probanx developed NSX's distributed ledger fully KYC compliant, AML compliant trading platform would solve the naked shorting problem(and organised shorting possibly) while providing instantaneous settlement of trades which is what has created Robinhood's woes. Taking out the slow middleman as it were. If NSX/ISX can get the trading platform working at scale this Trading and payments combined partnership/ecosystem could be a solution to these antiquated trading systems around the globe. I may be wrong in this but it is worthy of highlighting IMO and we should be keeping a keen eye on developments both with NSX/ISX and in the US.
Here is my take on the flykk ecosystem -- https://hotcopper.com.au/posts/50558309/single