Amongst the pink fiberglass insulation is vermiculite insulation. It is common for vermiculite to have naturally occurring asbestos particles as part of its makeup. If you see this in your attic get a professional in to test it.

If let untouched it does not pose much of a problem however if you plan any renovations, electrical work, a new attic loft the insulation will have to be removed and can be quite costly.

Asbestos is particularly concerning because if disturbed its airborne fibers can create long-term health complications when inhaled.