Which one? Gold was $20.67 per Troy ounce in 1920, that’s about $664.55 per kilo. 10 kilos about $6,645.55
I’m believing the first search result https://www.countryliving.com/life/g33398396/what-things-cost-100-years-ago/ says that matches up.
Gold is about $64,900 per kilo today so $649,000 for 10 bars, that’s a low cost of living middle class place or HCOL very small house that needs renovation.
I could see you meaning these days and houses in some areas are in the $6 million range, guess they should be location specific.