lit. for fishermen to move on land and drink well water, meaning one who can survive stress-free and well-off without working; go into early retirement
describes a person (who is in the position of desiring / expecting higher returns) who won't bother or be satisfied with low returns; literally: 'big hen won't eat small rice'; 'the eagle does not catch flies'
describes when someone is daring to take risk or willing to spend, he / she must either have a good basis to do so or something to back their up somehow to allow for it