Times are getting crazier, because it's hard to get money nowadays, lots of people do crazy things, a few days ago my neighbor was cheated by his "future" wife out of hundreds of millions of rupiah, the woman hijacked the man's smartphone and withdrew all of the man's savings, i wonder if this guy has Bitcoin on his smartphone, it's definitely not safe, however, fraudsters can come in any form and usually in the form of friends and close people, so be careful with people close to you, it's not a problem if you invest suspicious of them.
Hijack the smartphone and withdraw all the man's savings in bank account. It is a serious story and loss for the man and for people who want to show off their rich and property.
I guess the man could use very weak password so that the woman, his 'future' wife, could hijack that smart phone and bank account password to withdraw all his saving.
Some lessons to learn.
Don't show off your rich to other people.
Use strong passwords.
Don't store your money on phones.