i think it is not so difficult to earn o.1 bitcoin from in a week. if you invest your money in alt coin then you can really earn o.1 bitocin may be more just in a week. i seen such kind of people who earn 0.5 bitocin in a week.
you mean investing in altcoin is reffered to investing on ICO right? but i don't think ICO could end just in a week and also listed in exchangers that fast
unless if you're talking about trading,it's possible to be realized