honest, when prices rose bitcoin, very difficult to produce 0.1 BTC per day, even with trading. many are trying to switch from trading, to gambling, but mostly it just makes them less BTC. the only way to produce 0.1 BTC every week is to have a long-term investment in altcoin, or try to trade with the more powerful.
Actually as of now it is very hard to get 0.1 because of the high price of Bitcoin but if you confident to get that you do this. In trading have possible to earn 0.1 per week how? If you big capital in trading for sure you earn like that or more. For example you have 10-20 Bitcoin in trading and you buy 10-20 altcoin and very week those altcoin pump so you have profit and your target price will get. Big capital the profits is high if you have small capital your profit also low .
is not easy produce 0.1bitcoin/day
if trading you must have high skill without skill you can lost youre money
gambling is very high risk only lucky can get profit, but is very dificult can get constant profit with gambling
Well , the question was about how to make 0.1 BTC per week so that must be at least 7 times easier than to make 0.1 BTC daily, probably the easiest way will be with trading since it does not have a limit on the amount you can earn weekly.