Admittedly, the capital controls combined with higher taxation led households and businesses to tap their savings, in order to meet their current needs. 5/6  BIS central bankers' speeches  However, there can be no investment without domestic saving or, alternatively, without continued foreign financing.
But look at Switzerland: the country has its own currency and interest rates are extremely low nevertheless, namely because investors consider it a safe haven like Germany. You mentioned price stability. Inflation is currently very low. Where’s the harm in that? It is, above all, a question of confidence.