I would like to start a bounty on my own question. But I only see the following link:
If I go to any other question, then I do see the link:
What is going on here?
I suppose the reason is the following (quote from the FAQ on bounties):
If you are offering a bounty on a question that you have already posted an answer to, your minimum spend is 100 reputation (not 50).
And, of course:
You must have at least 75 reputation to start a bounty, and at least as much reputation as the bounty amount.
At the moment you have less than 100 reputation points, so you cannot start a bounty of 100 points.