Those involved in the sciences have long known and have long informed the general public that there is no such thing in the physical universe as "absolute zero", but I must beg to differ. My level of confidence in the security of on-line financial services is absolute zero.
Please consider the following self explanatory URLs:
https://abc7chicago.com/online-banking-zelle-app-protect-from-ransomware-bank/11748085/
https://www.cnbc.com/2022/06/18/former-amazon-employee-convicted-in-capital-one-hack.html
https://www.nbcconnecticut.com/news/local/webster-bank-warns-of-text-message-scam/1972398/
There are many URLs where one can find articles about security risks and security breaches at well known and well respected financial institutions where supposedly, the most up to date security measures are, or at least are supposed to be, in place.
Even if some "Super-Duper Financial Services Corporation" can offer the most advanced, gold plated, utterly impervious anti-hacking resources at its own organization, I myself am using just a lowly PC into which something (WinZip, ESet, Norton or whatever) has been installed. Maybe the company computer systems are impervious, but my own PC most definitely is not.
For full disclosure, I have made occasional purchases on line when there was absolutely no other option and in all but one incident, things came out okay. That one incident is a story in its own right, but as few times as I have done so, perhaps a half-dozen times in the last ten or twenty years, I am admittedly paranoid enough to do so again as least often as possible.
Additionally, I keep two credit card accounts, both of them decades old, one of which is on file at my medical prescriptions service. That account will NEVER be used for any on-line transaction because if a security problem were to arise, medicine availabilities could be put at risk.
Despite alternative available measures for acquiring vital medications on an emergency basis, such a scenario still has the potential to be life threatening.
I am not open to argument or refutation on the matter. As many reassurances as have been advanced to me by various persons, I simply leave the decisions of others, along with any consequences of those decisions, to those others who make them.