There are many ways to invest,  Even invest partial portfolio in gold, bitcoin, stocks makes sense. 

Even if someone breaks into your house, it is more likely the weapon will be stolen or used against you, than it is likely you will use it to defend yourself.I am not sure any of this matters relative to the original post, but interesting none the less.

just my observation.. some cities are simply worse than others.. one main thing I always look at is bar's on windows and caged condenser units.. that's an indication at least of petty theft.. but stolen condenser that will cost you a few bucks when and if that happens.

I'll end with saying I had a large sum of money stolen from me by a PM.

It needed about $6K in paint and carpet, other misc. repairs/improvements like the outside AC unit was stolen, and it was just major nasty. 

I would rather my tenants be armed than helpless in a home invasion. 1) I don’t want my property invaded or stuff stolen or damaged by an intruder 2) a dead or raped tenant makes for a lousy payer ! 

The properties had high turnover, and every time they did a make-ready, items would get stolen.

I know that to mine a bitcoin a computer has to do so many calculations, yada, yada,yada and a bitcoin is created-oh and there can only be 21 million  of them.

Use that private school tuition money to invest in Real Estate. or Bitcoin?

Tenant left the place trashed and it took a week or so to get broken window repaired and stolen stovetop range replaced.