Valentin Perkonigg 

@perkvalentin
Serial Founder and Angel Investor
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Alts.co
Alts.co
by Stefan von Imhof
The Curiosity Chronicle
The Curiosity Chronicle
by Sahil Bloom
Das Feierabend-Projekt
Das Feierabend-Projekt
by Isabell Prophet
Granted
Granted
by Adam Grant
Just a thought
Just a thought
by Valerie Krämer
Lenny's Newsletter
Lenny's Newsletter
by Lenny Rachitsky
The Pragmatic Engineer
The Pragmatic Engineer
by Gergely Orosz