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 have no doubt that trading altcoin or bitcoin will give you a big advantage if you have great capital and great skills. Because I often invest in my friends. He's good at trading and I get a lot of advantages from him by giving him a little capital