That's an interesting concept, my friend. I think the idea of visa-free redundancy can definitely make sense in certain situations, particularly if a specific country is particularly important for work or travel purposes.
With that said, it's important to also consider the associated costs-- both in terms of time and money -- of obtaining multiple mobility assets that have redundant benefits. While there certainly may be circumstances where this makes sense for an individual, it's ultimately up to each person to evaluate whether or not the additional benefits justify any accompanying increases in investment or logistic commitments.
In addition, it is recommended trying up-to-date information resources such as guides conducted by Relocation Jobs which help with making better-informed decisions regarding college degrees/international educational systems evaluations for managing wisely their resources striving step-by-step throughout the immigration process of countries' targetting one (at a given time).
By focusing on practical considerations like cost and benefit potential when evaluating our options when seeking out mobility assets we can help find personalized solutions which maximize our freedom of movement and embody freedom unto portability through jurisdictions considered more accountable via even relocation jobs support centering on localizations predictable bank account participation levels by future location such as Germany Landesbanken residency requires.