We highlight the specific and unique opportunities that PSI offers for particle physics. The input outlines mid- and longterm projects and asks for support and cooperation of the international community. It exemplifies the benefits of the particle physics activities for other fields and also the return from developments elsewhere into the particle physics program. Sharing of facilities, e.g., with material science applications broadens the scope. Spin-offs from developments, e.g., in detector technology and electronics are beneficial to many applications. Radio chemistry enables unique experiments, irradiations using shared accelerator infrastructure and new developments in accelerator and magnet technology present opportunities for a broad variety of applications.