One can make this with bounties, but this is also bound to a lot of work, so maybe just working a normals dayjob and converting some of that money into BTC will be the best choice. I dont think that there are easy ways that give you a passive income of 0.1 BTC per week. But if you are creative there certainly are such opportunities.
Bounty campaigns are not weekly paying to the people who are participating to their campaign because they are mostly into monthly basis before giving payments or rewards to the people who are currently participating. 0.1 bitcoin per week is only possible to the people who are trading different altcoins in the market.