To some extent, it depends on the context . Personally, I think you should give your startup 100%. I've had to make a similar decision before and chose that route for a few reasons:
1. for most startups, except with the exception of some lifestyle startups, it won't succeed if you give it 50%.
2. it matters to you, personally. leaving the comfort zone was, to me, a statement to myself that I'm committed to this and have no fallbacks. With this point, I was really influenced by that one HN post about how Alexandar the Great would burn the ships they used to go somewhere for war, basically to say "theres no retreat"
1. for most startups, except with the exception of some lifestyle startups, it won't succeed if you give it 50%.
2. it matters to you, personally. leaving the comfort zone was, to me, a statement to myself that I'm committed to this and have no fallbacks. With this point, I was really influenced by that one HN post about how Alexandar the Great would burn the ships they used to go somewhere for war, basically to say "theres no retreat"