Not to mention that the existing Twitter infrastructure was already incredibly insecure before Musk even took over.

Twitter does little to monitor for so-called insider threats, employees or contractors who use their positions in the company to steal information, and instead leaves them “virtually unmonitored."

Twitter suffered security incidents significant enough to warrant a report to a government agency about once a week, with 20 breaches in 2020 alone.

Twitter devs can already take over user accounts since they all have prod admin access (which they need because Twitter still has no QA or staging environments). I can only imagine the potential for abuse once people's finances get tied together with their account.