Keep in mind that many C&V bikes are actually valued less than "modern bikes".

So your very expensive vintage components look almost FREE next to a nice Campy Super Record 11 spd Carbon fiber EPS groupset.

Be careful of when, where, and for how long you lock your bike. But otherwise, get a good lock, and enjoy riding your bike. Stress about things like those elusive Strava KOMs, not the people ogling your bike.