I think it would be better to say what to do about the issue of housing/home ownership because homelessness has a different connotation.

i see two main issues:

1. sometimes you have a supply and demand issue, like in Canada where there is a lack of supply caused by gov planning rules (or so I'm told) which means there is not enough housing to go around which drives costs up and reduces supply past what a median earner can affordably manage
2. basic affordability - in a case where there are enough housing units available, people still can't afford a house because of the usual monetary debasement and wages that don't rise enough with inflation.

also, because fiat is so broken and most people feel it, real estate is being used as an investment and savings vehicle, instead of just something to live in. then you have people from other countries buying up units in Western countries because the laws and protections are better

then finally, you have homeless in general which @SimpleStacker talked about.

when a person has a broken mind and soul and is being self-destructive, there's no magic thing anyone can do, other than invent a time machine and make sure they didn't have such a terrible childhood etc

i would be interested to know about homeless levels during the gold standard, pretty sure there were no tent encampments back then