The only way you can earn 0.1 btc per week has two options.
1. You will have a freelance job and receive your payment in bitcoin.
2. You will be a good trader and make profit from altcoin trading.
The rest is hard.
I know an option that is easy also and doesn't need too much capital for this and that is multi level marketing or networking. We all know that most of the companies now in the internet are offering affiliate program where you will earn commission by just referring people to their sites so if you will have a good networking skills plus the site that you are promoting has a good service then you will easily earn more than 0.1 bitcoin per week.