Doing a good postdoc would possibly find your own academic niche, and vision . Without the "niche", you don't have a bright future in academia. One should focus on selective few things, and you can do applied bioinformatics too. I have many collaboration requests in bioinformatics, so that I turned down many of them. Such collaborations eat into my own research, but you can see how many people can make an academic career just through collaborations.