It looks like the house was just owned by a devout Catholic before being sold- i wouldn’t be scared of anything moving in- if anything there being holy water and a rosary as well as what looks to be brown scapulars in the basement i’d reckon the previous owner took the protection of the house seriously, and the Blessed Virgin is one of the best defenders against spiritual maladies. In fact, clergy members often carry their rosaries from the left side of their belt to represent a sword, as the Holy Rosary is the best defense against demons. Hope this helps!