How to get the bitizen back to work

The great things about bitizens is that they never seem to need to sleep. Thankfully you don't have to manage your bitizens personal concerns in this game, as the focus is the tower. Your bitizens will work 24/7 without any loss of productivity, so long as you can keep your shops stocked. So, yes, shops should be open at all times.

If you see them complaining in the Bitbook, I think that's just the developers way of adding some personality into the game. :) The only way to make a bitizen happy in the game is to employ them in their dream job. Failing that, until their dream job opens in your tower, best practice is to match them with the area that they are highest in according to their profile. They will at least remain content until such time as their dream job opens and you reassign them. So long as you can match them with a job of interest level 5 or greater, they will be content. Anything less than 5 and they will be unhappy in their job.

'Bit-Book' is to Bitizens (the little employees that stay in your tiny tower) as Facebook is to (IRL) humans. The feeds posted in your bit book are, on average, just jokes.

Although, in some cases you will see your employees / residents posting relevant information (for example, in your case), such as "I hate my job". This just means that they have a skill level of 5 or lower in that current position and/or they have a higher skill in a different job type.

My recommendation for your scenario would be to just keep that employee in your Fortune Teller floor for the double stock bonus and just wait for someone else with a higher skill & Dream Job of Fortune Teller to replace that employee (as you already received the tiny buck bonus).