There's no secrets to earn 1BTC per week, you only need is to become efficient, patient and hardworking. Also be wise especially to the decision you been made. Because if you want to earn income you can make a strategy to make it happen.
OP is asking how to earn 0.1 btc/week, earned 1 btc in a week is kinda crazy though but it's not impossible if you have very huge bankroll for trading or other bussiness (not gambling).
join some signature campaign , but 0.1 per week is hard i think
0.1 per week from signature campaigns is near impossible
unless you post like an absolute madmanUnless there are campaigns which willing to pay you 0.1 btc in a week (As we can see now there is no any campaigns which offer 0.1 btc in a week for their parcitipants). Even though you have posted like madman, you won't earn 0.1 btc because all campaigns have their rules about max posts in a week or month and they are also have limit posts.