BTC has saved a lot of people, but there is another side to every aspect, like if it has provided us the freedom then it has become a problem as well I mean there were cases when people got looted by robbers at gunpoint and the robbers knew they had BTC and they demand for BTC which was non trace-able. This can become a problem when too many people around you will know you have BTC and you deal in this field of life.
IMO, I think it's a general problem that certain factors (like society, government, security agencies, etc) has caused. People gets robbed of their belongings and valuables, which is a thing that we hear of in the society, so if someone's Bitcoin was demanded for at gun point, then we should also consider any of the factors I mentioned earlier. Government failing to either create jobs or enhance the security level of a nation or state, the security agencies failing to do the necessary jobs, and a society that does not bring up children in the right way thereby creating more criminals.
There are some people who don't leave anything relating to crypto currency on the accessible side of their phone. I think these set of people are less vulnerable to such theft, because there is no way criminals will find out. So even if they got robbed, their phone might be stolen, but the coins will still be intact for the victim to quickly find other means to transferring them out.
While for those who leave their crypto related activities on their accessible part of their phone, then they are likely to fail victim for both robbery and crypto theft.