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.
If you want to get more from BTC 0.1 within a day, then the way will not give drop in income is to do an online business, because by simply doing business online will certainly be sold at any price as long as the goods are indeed necessary and indeed provide sustainable benefits. Trading, gambling, investing only gives profits in a short enough time. But if business, will always provide sustainable profits
Indeed earning a 0.1 BTC from scratch within a week is an impossible job, if you really want to make that amount of money you at least have to start with some capital, and with no skill what so ever in trading and investing starting a business is the best option you have like buying and selling stuff that people really need it does not have to be a physical thing it could be a service like programming or logo designing for websites.