Basically every bank blocks Tor and many even block VPNs. Also, Tor Browser is not particularly secure. It's been designed for fingerprinting resistance and network anonymity through the Tor network. The Tor Browser is based on Firefox, which lacks many important security features like site isolation, Control Flow Integrity or any meaningful sandboxing. I absolutely hate Google and their monopolistic business practices, but Chromium is by far the most secure browser. Especially when it's running on a secure mobile operating system. GrapheneOS goes even further than Android and deploys a hardened memory allocator (which was actually ported from OpenBSD), which significantly reduces the risk for memory coruption. On the newest generation of mobile SOCs (ARMv9), GrapheneOS enables memory tagging by default. Again, find me a desktop platform with MTE. This once again proves my point that mobile devices are simply more secure. Every single piece of hardware and software in your phone has been built with a strong focus of security.
Or, better, use monero.
I absolutely agree on this one. Look at the Lemmy instance I'm on. I'm a big fan of Monero, but unfortunately there aren't many places that accept XMR.