Select the rows you want hidden, click in the address window (upper left of
sheet where you see the cell reference).  Type a name in that window to give
the selected rows a "Named Range".  Then put that name in your code in place
of the rows reference.  This way, when rows are added above, the named range
will remain constant.

Assign a Named Range to the rows and use the name:

Sub demo()
Range("ready_for_hide").EntireRow.Hidden = True
End Sub

The named cells will adjust as rows are added or deleted.