Hackers gather bread crumbs. Putting anything financial on a smart phone is dumb -- until the tech is better. But this is not my opinion. Many techies, computer nerds and black hatters say the same thing.
Things might change with the privacy-focused Librem 5 smartphone, at least if they can get it crowdfunded by late next month.
But if you aren't on an air gapped rasp pi or a trezor or paper wallet for your main stash, you are running a risk of a keylogger/capture on any device. It doesn't matter if it is a phone or not.
IMO if there is one platform that big corporations and the general consumer throw money at for security, it will be the mobile platforms. I believe a lightweight and secure version of monero, capable of running on devices like a phone, refrigerator, or your car could be something useful.
Not sure people think about the weight of a blockchain anymore and how it might work in an iot world. This is why I like aeon.
