I like this thought of James Clear in his 3-2-1 Newsletter:
Concentration produces wealth.
Diversification protects wealth.
Because Postbank doesn’t manage to send me the information I need, I have to call them over and over giving me the opportunity to find out the best way to convince a telephone computer to connect you with a human. Just go on pressing one button. The voice of the machine isn’t as friendly as before but it does the job. :-)